Afghans shout anti-American slogans during a protest in Khost, east of Kabul, Afghanistan, Friday, Oct. 8, 2010. Firing from NATO helicopters in an eastern province Friday killed six Afghan militiamen who purportedly shot at the aircraft, an Afghan official said. (AP Photo/Nashanuddin Khan)

Photo by: Nashanuddin Khan

Afghans shout anti-American slogans during a protest in Khost, east of Kabul, Afghanistan, Friday, Oct. 8, 2010. Firing from NATO helicopters in an eastern province Friday killed six Afghan militiamen who purportedly shot at the aircraft, an Afghan official said. (AP Photo/Nashanuddin Khan)