http://en.rsf.org/press-freedom-index-2011-2012,1043.html
And here are some of the reasons:
http://en.rsf.org/united-states.html
http://www.dailykos.com/story/2012/01/25/1058454/-Reporters-Without-Borders:-Targeting-of-Occupy-journalists-drops-US-to-47th-in-press-freedom