why there's no pins in my maps charts

[Hao Ban]

I copy paste the source code from the website. Use IE, Firefox and Chrome to open it all the same.
Not like the charts in the website, no red pins on the maps? But the maps are correct.
Does someone know why? Thanks!

[Hao Ban]

Styling Maps looks like this, no red pins on the map.

[Daniel LaLiberte]

If you only copy-paste the map chart examples, you will also copy a mapsApiKey that won't help for public usage.  Note the comment: 

        // Note: you will need to get a mapsApiKey for your project.
        // See: https://developers.google.com/chart/interactive/docs/basic_load_libs#load-settings
        'mapsApiKey': 'AIzaSyD-9tSrke72PouQMnMX-a7eZSW0jkFMBWY'

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Daniel LaLiberte

dlaliberte@Google.com   5CC, Cambridge MA