** FILE ** In this May 10, 2010, file photo, Commander of U.S. and NATO forces in Afghanistan Gen. Stanley McChrystal, and U.S. Ambassador to Afghanistan Karl W. Eikenberry brief reporters ahead of Afghan President Hamid Karzai's visit at the White House. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

** FILE ** In this May 10, 2010, file photo, Commander of U.S. and NATO forces in Afghanistan Gen. Stanley McChrystal, and U.S. Ambassador to Afghanistan Karl W. Eikenberry brief reporters ahead of Afghan President Hamid Karzai's visit at the White House. (AP Photo/Charles Dharapak)