A U.S. Air Force F-16D Fighting Falcon aircraft assigned to the 18th Aggressor Squadron, Eielson Air Force Base (AFB), Alaska, conducts a mission during Exercise Cope North at Andersen AFB, Guam, Feb. 15, 2010. The U.S. Air Force and the Japan Air Self-Defense Force conduct Cope North annually at Andersen Air Force Base to increase combat readiness and interoperability, concentrating on coordination and evaluation of air tactics, techniques and procedures. (U.S. Air Force photo by Staff Sgt. Jacob N. Bailey/Released)

U.S. Soldiers with Alpha Company, 1st Battalion, 17th Infantry Regiment gather around a fire to stay warm during an operation in the Helmand province of Afghanistan Feb. 14, 2010. (DoD photo by Tech. Sgt. Efren Lopez, U.S. Air Force/Released)

A U.S. Air Force F-16D Fighting Falcon aircraft assigned to the 18th Aggressor Squadron, Eielson Air Force Base (AFB), Alaska, takes off from Andersen AFB, Guam, during Exercise Cope North, Feb. 15, 2010. The U.S. Air Force and the Japan Air Self-Defense Force conduct Cope North annually at Andersen Air Force Base to increase combat readiness and interoperability, concentrating on coordination and evaluation of air tactics, techniques and procedures. (U.S. Air Force photo by Staff Sgt. Jacob N. Bailey/Released)

A U.S. Air Force F-16D Fighting Falcon aircraft assigned to the 18th Aggressor Squadron, Eielson Air Force Base (AFB), Alaska, conducts a mission during Exercise Cope North at Andersen AFB, Guam, Feb. 15, 2010. The U.S. Air Force and the Japan Air Self-Defense Force conduct Cope North annually at Andersen Air Force Base to increase combat readiness and interoperability, concentrating on coordination and evaluation of air tactics, techniques and procedures. (U.S. Air Force photo by Staff Sgt. Jacob N. Bailey/Released)

U.S. Soldiers attached to the 82nd Airborne Division, Fort Bragg, N.C., and the Jordanian United Nations help earthquake survivors carry 100-pound bags of rice at a distribution point in Port-au-Prince, Haiti, Feb. 13, 2010. Coordinated by Save the Children, a non-government organization, 904 bags of rice were distributed to hundreds of displaced survivors. (U.S. Navy photo by Logistics Specialist 1st Class Kelly Chastain/Released)

U.S. Army Pfc. Stephen Atwood, from Alpha Company, 1st Battalion, 17th Infantry Regiment, scouts for enemy activity during an operation in the Helmand province of Afghanistan Feb. 13, 2010. (DoD photo by Tech. Sgt. Efren Lopez, U.S. Air Force/Released)

A CH-53E Super Stallion helicopter with Marine Heavy Helicopter Squadron (HMH) 466, Marine Aircraft Group 40, Marine Expeditionary Brigade-Afghanistan takes off to insert Marines into Marjeh, Helmand province, Afghanistan, Feb. 13, 2010, in support of Operation Moshtarak. The operation is helping to liberate the city of insurgent activity and make it safe for the local populace. (U.S. Marine Corps photo by Sgt. Timothy Brumley/Released)

U.S. Marines and Sailors from Bravo Company, 1st Battalion, 6th Marine Regiment ride in a CH-53E Super Stallion helicopter with Marine Heavy Helicopter Squadron (HMH) 466, Marine Aircraft Group 40, Marine Expeditionary Brigade-Afghanistan before inserting into Marjeh, Helmand province, Afghanistan, Feb. 13, 2010, in support of Operation Moshtarak. The operation is helping to liberate the city of insurgent activity and make it safe for the local populace. (U.S. Marine Corps photo by Sgt. Timothy Brumley/Released)

U.S. Army Sgt. Chad Hare, assigned to the 203rd Military Intelligence Battalion, watches as Iraqi Federal Police, assigned to 3rd Brigade 1st Iraqi Federal Police, conduct improvised explosives device exploitation searches as part of a WIT class during a two week training course, Task Force Nassir, on command observation post Cashe North, Baghdad, Iraq, Feb. 13, 2010. The training is designed to enhance the combat and leadership skills of the Iraqi Federal Police. (U.S. Army photo by Sgt. Shawnon Lott/Released)

Japan Air Self-Defense Force Maj. Aizawa, an F-2 attack fighter pilot assigned to the 8th Combat Wing, 6th Tactical Fighter Squadron, Tsuiki Air Base, Japan, prepares for a mission during Exercise Cope North at Andersen Air Force Base, Guam, Feb. 12, 2010. The U.S. Air Force and the Japan Air Self-Defense Force conduct Cope North annually at Andersen Air Force Base to increase combat readiness and interoperability, concentrating on coordination and evaluation of air tactics, techniques and procedures. (U.S. Air Force photo by Staff Sgt. Jacob N. Bailey/Released)