U.S. President Barack Obama speaks to the troops at Bagram Air Base in Afghanistan

President Barack Obama addresses American troops at Bagram Air Force Base in Afghanistan. Obama thanks the troops for their efforts, talks about America's military history, recent Medal of Honor winners, the objectives of the war in Afghanistan, and promises that the U.S. "will prevail". General David H. Petraeus, Commander, U.S. Forces Afghanistan, introduces the President.