A U.S. helicopter mistook troops on the ground in Afghanistan as members of the Taliban, but they were Americans and all five were killed.
Read story here:
http://www.cnn.com/2014/06/10/world/asia/afghanistan-isaf-deaths/index.html
Read story here:
http://www.cnn.com/2014/06/10/world/asia/afghanistan-isaf-deaths/index.html