Three US Troops Killed in Afghanistan

    They're called 'green on blue' attacks and they keep happening in Afghanistan, killing U.S. troops. Three more US troops died Friday.

    FOX News Radio's Courtney Kealy reports:

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    A man wearing an Afghan Army uniform shot and killed the three U.S. soldiers according to the U.S. military command and the Taliban claimed responsibility. It's the the third such attack in a week. This shooting taking place in southern Afghanistan where U.S. forces are working with their Afghan counterparts to train local police. Thirty coalition troops have been killed in 20 such attacks so far this year.

    Courtney Kealy, FOX News Radio.