A U.S. Air Force loadmaster, right, aboard an MC-130H Combat Talon II aircraft conducts a preflight check on his oxygen mask at Hurlburt Field, Fla., Feb. 28, 2012, during exercise Emerald Warrior 2012. 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.