US Army Soldiers Fly Through Watapor Valley in Kunar Province, Afghanistan

WATAPOR VALLEY, AFGHANISTAN - SEPTEMBER 4: US Army soldiers from the 4th Infantry Division's 4th Brigade, 2nd Battalion - 12th Infantry Regiment, based in Fort Carson, Colorado, fly through mountainous terrain along the Watapor Valley September 4, 2009 in Kunar province, Afghanistan. Local Afghan taliban and foreign fighters have strongly resisted the presence of US forces in Kunar. (Photo by Robert Nickelsberg/Getty Images)