U.S. Defense Secretary Robert M. Gates delivers a speech at the opening of the 7th annual Asia Security Summit, May 31, 2008. The summit brings together senior security and defense officials from more than 20 Asian nations each year to discuss regional security concerns. Defense Dept. photo by U.S. Air Force Tech. Sgt. Jerry Morrison

U.S. Defense Secretary Robert M. Gates speaks at the opening of the 7th annual Asia Security Summit in Singapore, May 31, 2008. The summit, also known as the Shangri-La Dialogue after the hotel where it is held, brings together defense ministers, chiefs of staff and other senior security policy-makers from more than 20 Asian nations each year to discuss regional security concerns. Defense Dept. photo by U.S. Air Force Tech. Sgt. Jerry Morrison

U.S. Defense Secretary Robert M. Gates, right, has breakfast with U.S. Air Force Tech. Sgt. Brian Rice, 36th Expeditionary Aircraft Maintenance Squadron,on Andersen Air Force Base in Guam, May 30, 2008. Gates is on a seven-day trip visiting the Pacific and to attend the 2008 Shangri-La Dialogues in Singapore. Defense Dept. photo by U.S. Air Force Tech. Sgt. Jerry Morrison

U.S. Navy Lt. Megan Rieman gives a Salvadoran girl an eye exam at the Canton la Sunza school during Operation Continuing Promise 2008, a multinational humanitarian project involving the United States, El Salvador, Guatemala and Peru, May 26, 2008. Rieman is assigned to the USS Boxer, which is supporting the community relations mission. U.S. Navy photo by Petty Officer 3rd Class Porter Anderson

A U.S. Army Chinook Helicopter Ch-47 assigned to the 2nd Battalion, 3rd Aviation Regiment, 3rd Infantry Division, waits for detainees to come aboard in Baghdad, Iraq, on May 28, 2008. U.S. Army photo by Spc. Richard Del Vecchio

U.S. soldiers move out to assist Afghanistan National Army soldiers in searching several suspicious structures for weapons caches in the Narang Valley, Kunar province, Afghanistan, May 18, 2008. The soldiers are assigned to Company A, 2nd Battalion, 503rd Infantry Regiment. U.S. Army photo Spc. Gregory Argentieri

U.S. Air Force Capt. Loftin Graham inspects a KC-135R Stratotanker aircraft on Manas Air Base, Kyrgyzstan, May 28, 2008, prior to another refueling mission over Afghanistan. Graham is assigned to the 22nd Expeditionary Air Refueling Squadron, 376th Air Expeditionary Wing deployed from Fairchild Air Force Base, Wash. U.S. Air Force photo by Master Sgt. Andy Dunaway

U.S. Defense Secretary Robert M. Gates, far right, meets Singaporean Defense Attache Brig. Gen. Richard Lim, far left, Singaporean Defense Minister Teo Chee Hean, second from left, and U.S. Ambassador Patricia Herbold upon his arrival in Singapore, May 30, 2008. Gates is on a seven-day trip to visit the Pacific and attend the 2008 Shangri-La Dialogue in Singapore. Defense Dept. photo by U.S. Air Force Tech. Sgt. Jerry Morrison