Defense Secretary Robert Gates, right, is greeted by top NATO commander Gen. David Petraeus as he arrives in Kabul, Afghanistan on Thursday, Sept. 2, 2010. (AP Photo/Jim Watson, Pool)

Photo by: Jim Watson

Defense Secretary Robert Gates, right, is greeted by top NATO commander Gen. David Petraeus as he arrives in Kabul, Afghanistan on Thursday, Sept. 2, 2010. (AP Photo/Jim Watson, Pool)