[img]http://d.yimg.com/a/p/ap/20100405/capt.1e000c522c23487a8d5c4130de775296-1e000c522c23487a8d5c4130de775296-0.jpg?x=130&y=77&q=85&sig=iOL_I5kLFwSAbMOYEdeI9A--[/img]AP - A gritty war video circulating on the Internet that shows U.S. troops firing repeatedly on a group of men — some of whom were unarmed — walking down a Baghdad street is authentic, a senior U.S. military official confirmed Monday.