Airmen and Soldiers board a C-130 Hercules aircraft during Exercise Hydra 2009. Hydra is a training exercise developed by officials with the 615th Contingency Response Wing at Travis Air Force Base, Calif., to test mission capabilities such as command and control, aerial port, maintenance and air mobility liaison duties in a joint environment. (U. S. Air Force photo/Master Sgt. Cecilio Ricardo.

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