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A U.S. Airman from the 62nd Aircraft Maintenance Squadron uses a mobile truck mounted deicer to apply deicing fluid to the tail of a C-17 Globemaster III aircraft at Joint Base Lewis-McChord, Wash., Feb. 22, 2010, in preparation for a mission. (DoD photo by Abner Guzman, U.S. Air Force/Released)

ELMENDORF AIR FORCE BASE, Alaska—C-17 Globemaster IIIs from the Pacific Air Forces and Air Mobility Command sit on the ramp waiting to take off at Allen Army airfield in Fort Greely, Alaska Feb. 10. The aircraft were participating in an exercise that involved PACAF and AMC C-17s exploring capabilities in large formations and improving tactical awareness among aircrews.(Air Force photo/ Senior Airman Matt Coleman-Foster)

ELMENDORF AIR FORCE BASE, Alaska—C-17 Globemaster III from the 517th Airlift Squadron soars over the mountainous landscape near Fort Greely, Alaska Feb. 10. The aircraft was participating in an exercise that involved Pacific Air Force and Air Mobility Command C-17s exploring capabilities in large formations and improving tactical awareness among aircrews. (Air Force photo/ Senior Airman Matt Coleman-Foster)

Cargo is loaded onto a C-17 Globemaster III Feb. 8, 2010, at Langley Air Force Base, Va. Through a joint effort by Fort Eustis, Va., Soldiers and Langley AFB Airmen servicemembers and cargo are being transported to Haiti as part of Operation Unified Response.
(U.S. Air Force Photo/Senior Airman Dana Hill)