A C-17 Globemaster III from Joint Base Charleston waits to be launched on a combat air delivery mission over Afghanistan Feb. 1, 2010, at a base in the Middle East. The maximum payload capacity of a C-17 is 170,900 pounds and its maximum takeoff weight is 585,000 pounds. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Staff Sgt. Chris Rapp waits to be transported to a C-17 for a mission to Afghanistan Feb. 1, 2010. Sergeant Rapp is deployed with fellow members of the 14th Airlift Squadron to the Middle East. While deployed, Sergeant Rapp is assigned to the 816th Expeditionary Airlift Squadron, (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Staff Sgt. Chris Rapp, a C-17 Globemaster III loadmaster assigned to the 816th Expeditionary Airlift Squadron, guides a cargo-loader driver toward the aircraft's ramp Feb. 1, 2010, at Bagram Air Base, Afghanistan. Airmen and Soldiers loaded forty pallets of food and water to be air delivered to U.S. and Coalition forces in remote areas of Afghanistan. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Capt. Marcus F. Youngquist (left) and 1st Lt. Kyle J. Stewart, both C-17 Globemaster III pilots assigned to the 816th Expeditionary Airlift Squadron, step out of their aircraft to discuss the day's flight plan, while Soldiers and Airmen load 60,000 pounds of supplies into the aircraft Feb. 1, 2010, at Bagram Air Base, Afghanistan. The pilots are members of the 14th Airlift Squadron here, deployed in support of operations in the Middle East. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Passengers wait for take-off aboard a C-17 Globemaster III, Feb. 1, 2010, in the Middle East. A C-17 can seat 102 passengers with standard centerline seats or 134 troops with palletized seats. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Tech. Sgt. Joshua B. Wilberg, a C-17 Globemaster III loadmaster assigned to the 816th Expeditionary Airlift Squadron, calculates the weight distribution of 60,000 pounds of food and water to be air delivered over a forward-operating base in Afghanistan, Feb. 1, 2010. Sergeant Wilberg is a member of the 14th Airlift Squadron here and is deployed in support of combat operations in the Middle East. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

U.S. Air Force C-17 Globemaster III loadmasters and U.S. Army Soldiers load 40 containerized delivery system bundles of food and water to be air delivered to a forward operating base in Afghanistan Feb. 1, 2010, at Bagram Air Base, Afghanistan. The loadmasters are assigned to the 816th Expeditionary Airlift Squadron who are deployed from the 14th Airlift Squadron here ,and the Soldiers are assigned to the 612th Quartermaster Detachment. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Capt. Brian D. Phillips (left), Capt. Marcus F. Youngquist and Capt. Gabriel Chavarria, all C-17 Globemaster III pilots assigned to the 816th Expeditionary Airlift Squadron, park a C-17 at Bagram Air Base, Afghanistan, Feb. 1, 2010. The C-17 is equipped with two heads-up displays allowing pilots to fly their planned approach with their heads up, looking out of the cockpit by superimposing the necessary cues on their outside field of view. The pilots are members of the 14th Airlift Squadron here and are deployed in support of combat operations in the Middle East. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Tech. Sgt. Joshua B. Wilberg, a C-17 Globemaster III loadmaster assigned to the 816th Expeditionary Airlift Squadron in Southwest Asia, talks with a passenger during a airlift mission bound for Afghanistan, Feb. 1, 2010. Loadmasters plan cargo and passenger placement within permissible center of gravity limits of their respective aircraft. The aircrew later loaded the aircraft at Bagram Air Base, Afghanistan, and completed a combat air delivery over two separate delivery zones. Sergeant Wilberg is a member of the 14th Airlift Squadron here and is deployed in support of combat operations in the Middle East. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

An aerial view of the ground can be seen from a C-17 Globemaster III window during a combat air delivery mission bound for Afghanistan, Feb. 1, 2010. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez)

First Lieutenant Kyle J. Stewart, a C-17 Globemaster III pilot assigned to the 816th Expeditionary Airlift Squadron, prepares his flight helmet during a cargo transportation mission to Afghanistan Feb. 1, 2010, over Southwest Asia. Pilots plan and prepare for missions, brief other aircrew members and ensure aircraft are inspected for flight and ready. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Staff Sgt. Russell C. Johnson, a C-17 Globemaster III loadmaster assigned to the 816th Expeditionary Airlift Squadron, observes as 40 container delivery system bundles of food and water slide off the cargo ramp of a C-17 during a combat air delivery mission over a forward-operating base in Afghanistan, Feb. 1, 2010. Sergeant Johnson is a member of the 14th Airlift Squadron here and is deployed in support of combat operations in the Middle East. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

Staff Sgt. Chris Rapp, a C-17 Globemaster III loadmaster assigned to the 816th Expeditionary Airlift Squadron, removes hooks used to deploy parachutes attached to supplies air delivered over Afghanistan, Feb. 1, 2010. Sergeant Rapp is a member of the 14th Airlift Squadron here and is deployed in support of combat operations in the Middle East. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)

C-17 Globemaster III loadmasters, assigned to the 816th Expeditionary Airlift Squadron, take a break from re-stowing gear used to secure 60,000 pounds of supplies air delivered over Afghanistan, Feb. 1, 2010. The loadmasters are members of the 14th Airlift Squadron here and are deployed in support of combat operations in the Middle East. (U.S. Air Force photo/Staff Sgt. Manuel J. Martinez/released)