Our Airports Under Attack !...What's up you ask...well check out this Page for the Details !
MIRVman
see armed guards in every corner of the Airport..So whats next?
Terrorism has been a problem for airlines and air travelers since the
1970s, when Hijacking
http://www.northamptoncommittee.org/flyers/2005-06-24-Film-Flyer-Hijacking.jpg
and bombings became the method of choice for subversive, militant
organizations around the world.
Although security at airports has always been tight , the 9/11 attacks
woke http://www.fireox-international.com/fire/towers.jpg many people up
to a harsh reality -- it wasn't tight enough.
On that day, men armed with simple box cutters took over four passenger
jets and used them as flying bombs.
http://blog.kir.com/archives/airliner.jpg What security measures might
have stopped them? How has airport security changed since then?
According to the Department of Homeland Security,
http://www.dhs.gov/dhspublic/ 730 million people travel on passenger
jets every year, while more than 700 million pieces of their baggage
are screened for explosives and other dangerous items.
In this treatise, we'll find out how high-tech solutions are being used
to make flying as safe as possible -- and we'll also consider if what
we are doing is enough.
The First Line of Defense
Imagine for a second that you are a terrorist who wants to blow up or
hijack a plane. You know that once you get inside the airport, you will
have to pass through metal detectors,
http://www.nature.com/news/2004/040112/images/airport_180.jpg
bomb-sniffing dogs, and possibly a search of your clothes and luggage.
How could you bypass all of those security measures? You could climb a
fence or drive a truck to a sensitive area of the airport.
For this reason, the first line of defense in airport security is the
most obvious: fences, barriers and walls.
Tall fences that would be difficult to climb enclose the entire airport
property. Security patrols regularly scan the perimeter in case someone
tries to cut through the fence.
Especially sensitive areas, like fuel depots or the terminals and
baggage handling facilities are even more secure, with more fences and
security checkpoints. All access gates are monitored by either a guard
station or surveillance cameras.
Another risk is that someone could drive a truck or car containing a
bomb up to the airport terminal entrance and just blow up the airport
http://www.siegerland-airport.de/airport/luftbild_2004.jpg itself.
Airports have taken several steps to prevent this.
Large concrete barriers, designed to block vehicles up to the size of
large moving trucks, can be deployed if a threat is detected. Loading
zones, where people once parked their cars to get their baggage in or
out of the trunk, are now kept clear of traffic. No one is allowed to
park close to the terminal.
Who Are You?
One of the most important security measures at an airportis
http://www.teachnet.ie/dkeenahan/images/airport%20xray.jpg confirming
the identity of travelers. This is done by checking a photo ID, such as
a driver's license.
http://www.sor.mdps.state.ms.us/new_dl/CDLlicense.jpg If you are
traveling internationally, you need to present your passport.
http://www.ydt.gr/main/Attachments/Attachment12601_passport.jpg
Simply taking a look at a photo ID isn't enough, however. The high-tech
buzzword in airport security today is biometrics.Biometrics
http://www.automa.com.au/images/faceplusdots.jpg essentially means
checking fingerprints, retinal scans, and facial patterns using complex
computer systems to determine if someone is who they say they are - or
if they match a list of people the government has determined might be
potential terrorists.
A new system called CAPPS II could help accomplish some of this. Short
for Computer Assisted Passenger Prescreening System,
http://images.google.com/imgres?imgurl=http://www.dontspyonus.com/images/spy-chart-b1.jpg&imgrefurl=http://www.dontspyonus.com/chart.html&h=588&w=588&sz=90&tbnid=0c3QLKQlr5sJXM:&tbnh=132&tbnw=132&hl=en&start=1&prev=/images%3Fq%3Dcapps%2BII%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DG
CAPPS II will require more personal information from travelers when
they book their flights, which will lead to a risk assessment of no
risk, unknown risk, elevated risk, or high risk.
Passengers considered risky will be further screened. Although the
system has been delayed and isn't in place yet, the Department of
Homeland Security (DHS) predicts that CAPPS II will make check-in
faster for the average traveler.
You may have noticed the public address system at an airport replaying
an automated message telling you not to leave your bags unattended. And
you've probably noticed that check-in attendants are asking some
questions that sound a little odd:
Has your luggage been in your possession at all times?
Has anyone given you anything or asked you to carry on or check any
items for them?
These are very important questions. A tactic used on occasion by
terrorists is to hide a bomb inside an unsuspecting person's luggage.
Another tactic is to give something, maybe a toy or stuffed animal, to
someone who is about to board a plane. That innocent-seeming object may
actually be a bomb or other harmful device.
Just a month after the 9/11 attacks, the President signed a new law
that restructured and refocused the airport security efforts of the
U.S.
The Aviation and Transportation Security Act
http://ntl.bts.gov/faq/avtsa.html established a new agency, the
Transportation Security Administration http://www.tsa.gov/public/
(TSA). The TSA is part of the Department of Homeland Security. The
TSA's mission is to:
Prevent attacks on airports or aircraft
Prevent accidents and fatalities due to transport of hazardous
materials
Ensure safety and security of passengers
While the TSA deals with all forms of transportation, the Federal
Aviation Administration http://www.faa.gov/ (FAA) is devoted entirely
to the operation of the U.S.'s civil aviation. FAA agents are located
at every major airport for immediate response to possible threats.
Most major airports also have an entire police force, just like a small
town, monitoring all facets of the facility. Background checks are
required on all airport personnel, from baggage handlers to
security-team members, before they can be employed.
All airport personnel have photo-ID cards with their name, position and
access privileges clearly labeled.
Step Through, Please: Metal Detector
All public access to an airport is channeled through the terminal,
where every person must walk through a metal detector
http://www.munich-airport.de/Mediapool/Content/Bilder/SGM/metalldetektor.jpg
and all items must go through an X-ray machine.
http://www.visitmodesto.com/gallery/albums/Transportation/Airports/normal_Modesto-Airport-046.jpg
Almost all airport metal detectors are based on pulse induction (PI).
http://www.accuratelocators.com/ssp2100.html Typical PI systems use a
coil of wire on one side of the arch as the transmitter and receiver.
This technology sends powerful, short bursts (pulses) of current
through the coil of wire.
Each pulse generates a brief magnetic field. When the pulse ends, the
magnetic field reverses polarity and collapses very suddenly, resulting
in a sharp electrical spike. This spike lasts a few microseconds
(millionths of a second) and causes another current to run through the
coil.
This subsequent current is called the reflected pulse
http://oeiwcs.omron.com/stores/omron/images/newimages/EE-SPYf.jpg and
lasts only about 30 microseconds. Another pulse is then sent and the
process repeats. A typical PI-based metal detector sends about 100
pulses per second, but the number can vary greatly based on the
manufacturer and model, ranging from about 25 pulses per second to over
1,000.
If a metal object passes through the metal detector, the pulse creates
an opposite magnetic field in the object.
When the pulse's magnetic field collapses, causing the reflected pulse,
the magnetic field of the object makes it take longer for the reflected
pulse to completely disappear.
This process works something like echoes: If you yell in a room with
only a few hard surfaces, you probably hear only a very brief echo, or
you may not hear one at all.
But if you yell into a room with a lot of hard surfaces, the echo lasts
longer. In a PI metal detector, the magnetic fields from target objects
add their "echo" to the reflected pulse, making it last a fraction
longer than it would without them.
A sampling circuit in the metal detector is set to monitor the length
of the reflected pulse. By comparing it to the expected length, the
circuit can determine if another magnetic field has caused the
reflected pulse to take longer to decay. If the decay of the reflected
pulse takes more than a few microseconds longer than normal, there is
probably a metal object interfering with it.
The sampling circuit sends the tiny, weak signals that it monitors to a
device call an integrator.
http://www.alias.ltd.uk/images/I-DataIntegrator.gif The integrator
reads the signals from the sampling circuit, amplifying and converting
them to direct current (DC).
The DC's voltage is connected to an audio circuit, where it is changed
into a tone that the metal detector uses to indicate that a target
object has been found.
If an item is found, you are asked to remove any metal objects from
your person and step through again. If the metal detector continues to
indicate the presence of metal, the attendant uses a handheld detector,
http://images.google.com/imgres?imgurl=http://media.nasaexplores.com/lessons/03-051/images/weapon_detector.jpg&imgrefurl=http://nasaexplores.com/show2_articlea.php%3Fid%3D03-051&h=216&w=216&sz=44&tbnid=LMVMiCDscT8ynM:&tbnh=101&tbnw=101&hl=en&start=94&prev=/images%3Fq%3Dhandheld%2Bmetal%2Bdetector%26start%3D80%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DN
based on the same PI technology, to isolate the cause.
Many of the newer metal detectors on the market are multi-zone.
This means that they have multiple transmit and receive coils, each one
at a different height. Basically, it's like having several metal
detectors in a single unit
.
In the next section, we'll discuss what happens to your carry-on items
while you're going through the metal detector.
While you are stepping through the metal detector, your carry-on items
are going through the X-ray
http://www.news-star.com/images/122501/spe_shoescan.jpg system.
A conveyor belt carries each item past an X-ray machine. X-rays are
like light in that they are electromagnetic waves, but they are more
energetic, so they can penetrate many materials.
The machine used in airports usually is based on a dual-energy X-ray
system. This system has a single X-ray source sending out X-rays,
typically in the range of 140 to 160 kilovolt peak (KVP).
KVP refers to the amount of penetration an X-ray makes. The higher the
KVP, the further the X-ray penetrates.
After the X-rays pass through the item, they are picked up by a
detector. This detector then passes the X-rays on to a filter, which
blocks out the lower-energy X-rays.
The remaining high-energy X-rays hit a second detector.
http://www.as-e.com/img/popups/101gt01.jpg A computer circuit compares
the pick-ups of the two detectors to better represent low-energy
objects, such as most organic materials.
Since different materials absorb X-rays at different levels, the image
on the monitor lets the machine operator see distinct items inside your
bag.
Items are typically colored
http://images.google.com/imgres?imgurl=http://www.kamloopsairport.com/SiteCM/i/upload/F4C182DC1C27EC64FF9C28DC950A016A71310009.jpg&imgrefurl=http://www.kamloopsairport.com/security.htm&h=252&w=272&sz=24&tbnid=E0J0yYqyPxnRIM:&tbnh=100&tbnw=108&hl=en&start=2&prev=/images%3Fq%3Dxray%2Bsuitcase%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DG
on the display monitor, based on the range of energy that passes
through the object, to represent one of three main categories:
Organic
Inorganic
Metal
While the colors used to signify "inorganic" and "metal" may vary
between manufacturers, all X-ray systems use shades of orange to
represent "organic."
This is because most explosives are organic. Machine operators are
trained to look for suspicious items -- and not just obviously
suspicious items like guns or knives, but also anything that could be a
component of an improvised explosive device (IED).
http://www.globalsecurity.org/military/intro/ied.htm
Since there is no such thing as a commercially available bomb, IEDs are
the way most terrorists and hijackers gain control. An IED can be made
in an astounding variety of ways, from basic pipe bombs to
sophisticated, electronically-controlled component bombs.
A common misconception is that the X-ray machine used to check carry-on
items will damage film http://www.rockymountainfilm.com/images/e4.jpg
and electronic media. In actuality, all modern carry-on X-ray systems
are considered film-safe. This means that the amount of X-ray radiation
is not high enough to damage photographic film.
Since electronic media can withstand much more radiation than film can,
it is also safe from damage. However, the CT scanner and many of the
high-energy X-ray systems used to examine checked baggage can damage
film (electronic media is still safe), so you should always carry film
with you on the plane.
Electronic items, such as laptop computers,
http://www.refurbished-laptops-and-cheap-laptop-reviews.com/images/sony-vaio-laptop-computer-3.jpg
have so many different items packed into a relatively small area that
it can be difficult to determine if a bomb is hidden within the device.
That's why you may be asked to turn your laptop or PDA
http://www.qbs.com.pl/programy/qs-vianet/pic/pda/pda-poczta_przychodzaca.jpg
on. But even this is not sufficient evidence since a skilled criminal
could hide a bomb within a working electronic device.
For that reason, many airports also have a chemical sniffer.
http://imageserver1.textamerica.com/user.images.x/13/IMG_330213/_1110/T40411101535011.jpg
( This one in Grand Central, New York City )This is essentially an
automated chemistry lab in a box.
At random intervals, or if there is reason to suspect the electronic
device that someone is carrying, the security attendant quickly swipes
a cloth over the device and places the cloth on the sniffer.
http://www.spymaster.co.uk/images/explosivesniffer.jpeg
The sniffer analyzes the cloth for any trace residue of the types of
chemicals used to make bombs. If there is any residue, the sniffer
warns the security attendant of a potential bomb.
In addition to desktop sniffers , there are handheld versions, that can
be used to "sniff" lockers and other enclosed spaces and unattended
luggage.
Walk-through models, such as GE's Entry Scan 3,
http://www.brighamscully.com/photos/ge_homeland/EntryScan3.jpg
are also available. These sniffers can be used to detect explosives and
narcotics.
Now that you have passed through security and are waiting to board your
plane, let's see what is happening with your checked baggage.
Check Your Bags: X-ray Systems
In addition to passenger baggage, most planes carry enormous amounts of
cargo. All of this cargo has to be checked before it is loaded
Your luggage goes through a larger X-ray system.
Most airports use one of three systems to do this:
Medium X-ray systems - These are fixed systems that can scan an entire
pallet of cargo for suspicious items.
http://images.google.com/imgres?imgurl=http://www.as-e.com/img/popups/pallet_search_operator.jpg&imgrefurl=http://www.as-e.com/popups/pallet_search_operator.asp&h=479&w=640&sz=109&tbnid=1bPj3QtOypP0sM:&tbnh=101&tbnw=135&hl=en&start=4&prev=/images%3Fq%3Dpallet%2Bx-ray%2Bsystem%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DG%26as_qdr%3Dall
Mobile X-ray systems - A large truck carries a complete X-ray scanning
system. The truck drives
http://www.electromax.com/images/Rapiscan/rapiscan%20max.jpg very
slowly beside another, stopped truck to scan the entire contents of
that truck for suspicious items.
Fixed-site systems - This is an entire building that is basically one
huge X-ray scanner. A tractor-trailer
http://www.airport-technology.com/contractor_images/l-3_security/5_CX-2500M.jpg
is pulled into the building and the entire truck is scanned at one
time.
One old-fashioned method of bomb detection still works as well or
better than most hi-tech systems -- the use of trained dogs.
http://images.usatoday.com/news/gallery/reaction/ga.jpg These special
dogs, called K-9 units, have been trained to sniff out the specific
odors emitted by chemicals that are used to make bombs, as well the
odors of other items such as drugs.
Incredibly fast and accurate, a K-9 barks at a suspicious bag or
package, alerting the human companion that this item needs to be
investigated.
In addition to an X-ray system, many airports also use larger scanners.
Let's take a look at those next.
Check Your Bags: CT Scanners
The first security check that your checked bags go through depends on
the airport. In the United States, most major airports have a computer
tomography (CT) scanner.
http://static.howstuffworks.com/gif/airport-security-cargo1.jpg
A CT scanner is a hollow tube that surrounds your bag. The X-ray
mechanism revolves slowly around it, bombarding it with X-rays and
recording the resulting data. The CT scanner uses all of this data to
create a very detailed tomogram (slice) of the bag.
The scanner is able to calculate the mass and density of individual
objects in your bag based on this tomogram. If an object's mass/density
falls within the range of a dangerous material, the CT scanner warns
the operator of a potential hazardous object.
CT scanners are slow compared to other types of baggage-scanning
systems.
Because of this, they are not used to check every bag. Instead, only
bags that the computer flags as "suspicious" are checked. These flags
are triggered by any anomaly that shows up in the reservation or
check-in process.
For example, if a person buys a one-way ticket and pays cash, this is
considered atypical and could cause the computer to flag that person.
When this happens, that person's checked bags are immediately sent
through the CT scanner, which is usually located somewhere near the
ticketing counter.
In most other countries, particularly in Europe, all baggage is run
through a scanning system. These systems are basically larger versions
of the X-ray system used for carry-on items.
The main differences are that they are high-speed, automated machines
integrated into the normal baggage-handling system and the KVP range of
the X-rays is higher.
With all of these detectors, scanners and sniffers, it's pretty obvious
that you're not allowed take a gun or bomb on a plane. But what else is
prohibited?
Now Boarding
While most of the things that you can't take on board an airplane are
fairly obvious (guns, knives, explosives), there are some things that
most people wouldn't think about. Who would have thought that a smoke
detector could be considered hazardous?
If you do transport a hazardous material on a passenger plane without
declaring it, you could face a fine of up to $27,500!
Make sure you contact the local airport authority if you have any
concerns about an item you plan to carry with you on a trip.
Because terrorism is a constant and terrifying threat, this means that
any mention of certain words, such as "bomb," "hijack" or "gun," can
lead to your immediate removal from the plane and quite possibly your
arrest, even if the word is said in an innocent manner.
Everyone who works in aviation, from flight attendants to security
personnel, is trained to react immediately to those words.
You Can't Take it With You
There are a number of items that you cannot carry on a plane, and some
of that can't be packed in your bags, either:
Explosives: Fireworks, ammunition, sparklers, matches, gunpowder,
signal flares
Weapons: Guns, swords, pepper spray, mace, martial arts weapons,
swords, knives with blades of any length
Pressurized containers: Hair spray, oxygen tanks, propane tanks, spray
paint, insect repellant
Household items: Flammable liquids, solvents, bleach, pool chemicals,
flammable perfume in bottles 16 ounces or larger
Poisons: Insecticides, pesticides, rat poison, arsenic, cyanide
Corrosives: Car batteries, acids, lye, drain cleaner, mercury
Air Marshals
If fences and barriers are the first line of defense, the air marshals
are the last.
If everything else fails and a terrorist still gets onto a flight with
a weapon, an armed air marshal can take control of a situation and
restrain the attackers.
Although the air marshal program has existed since the 1970s, it has
never had as high of a profile as it has in the post-9/11 era.
An air marshal is a federal agent disguised to look like regular
passenger. Each air marshal is authorized to carry a gun and make
arrests.
There are not enough air marshals to cover every flight, so their
assignments are kept secret.
No one knows which passenger is the air marshal, or even if an air
marshal is present on the flight at all. Although their exact numbers
are kept classified, airline insiders estimate that only five percent
of U.S. flights have an air marshal on board.
This is still a major increase - in the years before 9/11, a handful of
marshals guarded just a few international flights.
In addition to policing the sky, new laws have forced the installation
of locks on cockpit doors. This could prevent hijackings by terrorists
who are trained to fly passenger jets by keeping them away from the
plane's controls.
Are we doing enough?
While billions of tax dollars are spent beefing up airport security,
there are fears that things are still not safe enough.
A March 2004 report by the Government Accountability Office (GAO,
formerly the General Accounting Office) said that there were still
problems "hiring, deploying, and training [TSA's] screener workforce.
Staffing shortages and TSA's hiring process continue to hinder its
ability to fully staff screening checkpoints."
The GAO also noted the extensive delays in the implementation of CAPPS
II,
http://images.google.com/imgres?imgurl=http://www.dontspyonus.com/images/spy-chart-b1.jpg&imgrefurl=http://www.dontspyonus.com/chart.html&h=588&w=588&sz=90&tbnid=0c3QLKQlr5sJXM:&tbnh=132&tbnw=132&hl=en&start=1&prev=/images%3Fq%3Dcapps%2BII%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DG
which is far behind schedule and doesn't even have date of completion
or cost estimates. The GAO report states, "TSA has not fully addressed
seven of eight issues identified by Congress as key elements related to
the development, operation, and public acceptance of CAPPS II."
The air marshal program also came under fire in the GAO report -
The need for many additional marshals resulted in an abbreviated
training program, and budget cuts have further crippled the program.
A recent investigation by the DHS's inspector general found 753 reports
of air marshal misconduct during an eight-month period in 2002,
including sleeping and being drunk while on duty.
Finally, many security experts fear there are too many threats that
aren't being addressed at all. Many baggage handlers, mechanics and
other technicians with access to airplanes are not screened or
searched. Handheld surface-to-air rocket launchers
http://www.usspreble.org/pictures/p1991_3.jpg are another concern -
currently, U.S. aviation has virtually no defense against such an
attack.
So until they mandate biological implants, with GPS/Bomb/lie
dectector
capabilities, in our arm for scanning...What's ya gonna do?
:)MIRVman