An F-15E Strike Eagle is refueled by a KC-135 Stratotanker, Jan. 14, 2011, above Afghanistan, in support of Operation Enduring Freedom. U.S. Air Force photo by Master Sgt. Adrian Cadiz

Members of NATO reserve force interact with an explosive ordnance disposal manned transportable robot , Jan. 28, 2011, during a tour of Navy Expeditionary Combat Command. The NATO personnel visited the command to meet with sailors from the expeditionary community and see how the command incorporates reservists into the expeditionary force. U.S. Navy photo by Petty Officer 2nd Class Paul D. Williams

An EA-18G Growler assigned to the Shadowhawks of Electronic Attack Squadron 141 prepares to take off from the aircraft carrier USS George H.W. Bush. The carrier is under way in the Atlantic Ocean conducting a composite training unit exercise. U.S. Navy photo by Seaman Billy Ho

Fireman Andrew Beagles welds shelves in the pipe shop aboard the aircraft carrier USS George H.W. Bush, Jan. 27, 2011. George H.W. Bush is underway in the Atlantic Ocean conducting a composite training unit exercise. U.S. Navy photo by Seaman Tyrell K. Morris

Air Force Chief of Staff Gen. Norton Schwartz speaks at the Reserve Officers Association National Security Symposium Jan. 30, 2011, in Washington, D.C. Schwartz discussed the importance of total force collaboration during today's intense budgetary pressures. U.S. Air Force photo by Scott M. Ash

Deputy Defense Secretary William J. Lynn III presents a check for $17,200,000.00 to Rene Acosta, president and CEO of Global Impact, the firm that manages the Combined Federal Campaign, at the annual Combined Federal Campaign awards ceremony at the Pentagon on Jan. 31, 2011. Even in these difficult economic times, Lynn said, the Department of Defense came through for the over 4,000 charities represented in the CFC. DOD photo by R. D. Ward

U.S. Navy Petty Officer 3rd Class Mark Bonner signals Marines driving amphibious assault vehicles during recovery operations aboard the amphibious transport dock ship USS Denver, in Okinawa, Japan, Jan. 28, 2011. The Denver is part of the Essex Amphibious Ready Group and is on a deployment in the western Pacific Ocean. U.S. Navy photo by Seaman Paul Kelly

A U.S. Navy aircraft director signals the pilot as aviation ordnancemen unload ordnance from an F/A-18E Super Hornet aboard the Nimitz-class aircraft carrier USS Carl Vinson, which is under way in the Bay of Bengal, Jan. 28, 2011. U.S. Navy photo by Petty Officer 2nd Class James R. Evans