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U.S. Army MH-47G Chinook helicopter pilots perform preflight operations during Emerald Warrior 2013 at Hurlburt Field, Fla., April 29, 2013.
Emerald Warrior is an annual two-week joint/combined tactical exercise sponsored by U.S. Special Operations Command designed to leverage lessons learned from operations Iraqi and Enduring Freedom to provide trained and ready forces to combatant commanders. (DoD photo by Staff Sgt. Elizabeth Rissmiller, U.S. Air Force/Released). Original public domain image from Flickr
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