U.S. Air Force Vice Chief of Staff Gen. Duncan J. McNabb sits with members of the Air Force Escape and Evasion Society, April 26, 2008, during their 44th annual reunion near Savannah, Ga. McNabb was the keynote speaker for the event held in honor of Air Force veterans who were forced down behind enemy lines and avoided or escaped capture during World War II. Photo courtesy of the Air Force Escape and Evasion Society

U.S. Air Force Staff Sgt. Brian Miliefsky prepares a C-130J Hercules aircraft for a mission at Bagram Air Field, Afghanistan, April 29, 2008. Miliefsky is a loadmaster assigned to the 774th Expeditionary Airlift Squadron and deployed from the California Air National Guard’s 115th Airlift Squadron out of Channel Island Air National Guard Station, Calif. U.S. Air Force photo by Master Sgt. Andy Dunaway

U.S. Army Cpl. Abraham Norton holds guard for his unit while they search for weapon caches in Taji Qada, northwest of Baghdad, April 25, 2008. Norton is an infantry team leader assigned to the 25th Infantry Division's 1st Battalion, 27th Infantry Regiment, 2nd Stryker Brigade Combat Team. U.S. Army photo by Spc. Brian Pierce

U.S. Air Force Senior Airman Mark Ostrander and Tech. Sgt. Chris Padron talk with an Afghan police officer, April 22, 2008, at the Charikar District Provincial Headquarters in Afghanistan. U.S. Air Force photo by Master Sgt. Andy Dunaway

U.S. Air Force Staff Sgt. Jessica Newcomb does some final touch ups on a mural she and 38 other artists painted in the hospital conference room on Bagram Air Base, Afghanistan, April 29, 2008. The mural features local culture and a panoramic view of the mountains near Bagram Air Force Base. U.S. Air Force photo by Master Sgt. Demetrius Lester

Seen through a night vision device, a U.S. soldier keeps an eye on a busy neighborhood in Tikrit, Iraq, April 24, 2008, where local citizens are shifting their concerns from security to economics. The soldier is assigned to the 101st Airborne Division's 1st Brigade Combat Team. U.S. Army photo by Spc. Richard Rzepka

U.S. Navy Petty Officer 3rd Class Scott Roark, a culinary specialist stationed aboard the USS Farragut, retrieves a flight drone after a gun exercise with the help of a Coast Guard Northland small boat crew, off the coast of Brazil, April 26, 2008. U.S. Coast Guard photo by Petty Officer 2nd Class Nathan Henise

Defense Secretary Robert M. Gates, center right, meets with Secretary of Government Juan Mourino and Secretary of Foreign Affairs Patricia Espinosa in Mexico City, Mexico, April 29, 2008. Defense Dept. photo by Cherie Cullen