U.S. Army Spc. Brandon Kessler, center, from Headquarters, and Headquarters Company, 38th Infantry Division, plays rock-paper-scissors, with Afghan children, during a presence patrol, outside of Bagram Air Field, Afghanistan, Feb. 21, 2010. (U.S. Army photo by Staff Sgt. Horace Murray/Released)

U.S. Army 2nd Lt. Jesse Underwood engages enemy forces during Operation Moshtarak in Badula Qulp, Afghanistan, Feb. 19, 2010. The International Security Assistance Force operation is an offensive mission being conducted in areas of Afghanistan prevalent in drug-trafficking and Taliban insurgency. Underwood is from Alpha Company, 1st Battalion, 17th Infantry Regiment. (DoD photo by Tech. Sgt. Efren Lopez, U.S. Air Force/Released)

Wreckage from an-MH-60S Knighthawk helicopter is photographed at a crash site in Pocahontas County, W.Va., Feb. 18, 2010. The helicopter, which was en route to Camp Dawson, W. Va., for training during exercise Southbound Trooper X, went down with 17 military personnel on board. (U.S. Army photo by Staff Sgt. Tracy Hohman/Released)

Wreckage from an-MH-60S Knighthawk helicopter is photographed at a crash site in Pocahontas County, W.Va., Feb. 18, 2010. The helicopter, which was en route to Camp Dawson, W. Va., for training during exercise Southbound Trooper X, went down with 17 military personnel on board. (U.S. Army photo by Staff Sgt. Tracy Hohman/Released)

A United Nations Peacekeeper from Jordan helps an earthquake survivor carry a 100-pound bag of rice at a food distribution site in Port-au-Prince, Haiti, Feb. 18, 2010. The U.S. Agency for International Development, a non-government organization, provided the bags of grain. (U.S. Navy photo by Mass Communication Specialist 2nd Class Joan E. Kretschmer/Released)

A U.S. Air Force KC-135 Stratotanker aircraft crew from the 465th Air Refueling Squadron, Tinker Air Force Base (AFB), Okla., conducts preflight checks before an aerial refueling mission at Andersen AFB, Guam, Feb. 17, 2010. (U.S. Air Force photo by Staff Sgt. Andy M. Kin/Released)

A joint military team searches for debris at the site where an-MH-60S Knighthawk helicopter crashed in Pocahontas County, W.Va., Feb. 18, 2010. The helicopter, which was en route to Camp Dawson, W. Va., for training during exercise Southbound Trooper X, went down with 17 military personnel on board. (U.S. Army photo by Staff Sgt. Tracy Hohman/Released)

A U.S. Air Force F-22 Raptor aircraft assigned to the 90th Fighter Squadron, Elmendorf Air Force Base (AFB), Alaska, receives fuel from a KC-135 Stratotanker aircraft assigned to the 465th Air Refueling Squadron, Tinker AFB, Okla., near Guam Feb. 17, 2010. (U.S. Air Force photo by Staff Sgt. Andy M. Kin/Released)

U.S. Airmen load a Coast Guard patrol boat into a C-17 Globemaster III aircraft at March Air Reserve Base, Calif., Feb. 18, 2010, during Patriot Hook 2010. Patriot Hook is an air mobility exercise with participants from the Air Force, Navy, Coast Guard, Federal Emergency Management Agency and Border Patrol. (DoD photo by Tech. Sgt. Joe Zuccaro, U.S. Air Force/Released)

U.S. Sailors man the rails as the guided-missile destroyer USS Donald Cook (DDG 75) returns to Naval Station Norfolk, Va., Feb. 18, 2010, following a seven-month deployment. The ship deployed to the U.S. 6th Fleet area of responsibility in support of theater security cooperation by participating in regional exercises with allies. (DoD photo by Chief Mass Communication Specialist Scott B. Boyle, U.S. Navy/Released)