Army Gen. David Petraeus (13 images)

U.S. Ambassador to Iraq Ryan Crocker (R) and Army Gen. David Petraeus, commander of the Multi-National Force Iraq, testify before a Senate Foreign Relations Committee hearing on the situation in Iraq on Capitol Hill in Washington on April 8, 2008. (UPI Photo/Kevin Dietsch)

Army Gen. David Petraeus, commander of the Multi-National Force Iraq, testify during a Senate Armed Services Committee hearing on the situation in Iraq on Capitol Hill in Washington on April 8, 2008. (UPI Photo/Kevin Dietsch)

Democratic presidential candidate Sen. Hillary Rodham Clinton, D-NY, (R) greets Army General David Petraeus, commander of the Multi-National Force-Iraq, prior to a Senate Armed Services Committee hearing on the situation in Iraq Capitol Hill on April 8, 2008. UPI Photo/Patrick D. McDermott)

Army Gen. David Petraeus, commander of the Multi-National Force-Iraq, chats with Republican presumptive presidential nominee Sen. John McCain, R-AZ, and Sen. John Warner, R-VA, (L to R) prior to a Senate Armed Services Committee hearing on the situation in Iraq on Capitol Hill in Washington on April 8, 2008. (UPI Photo/Kevin Dietsch)