General John R. Allen, left, incoming commander, International Security Assistance Force (ISAF)/U.S. Forces- Afghanistan (USFOR-A) and General David H. Petraeus, commander, ISAF/USFOR-A, attend a meeting in Kabul, Afghanistan in this July 9, 2011 file photograph.
(Joshue Treadwell/REUTERS/U.S. Navy/Handout)
