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Marine Corps Recruiting on Instagram: "Happy 249th birthday, Marines. Our battle color streamers tell the story of the collective fight Marines have won for our Nation since the birth of the Corps. These colors represent the collective determination of an entire unit committed to winning for our cause. Marines recognize the meaning behind each color and take pride in the values and battles they signify."

U.S. Airmen with the 823rd Base Defense Squadron and the 38th Rescue Squadron ground themselves as an HH-60G Pave Hawk helicopter assigned to the 41st Rescue Squadron hovers above during a simulated medical evacuation at Avon Park Air Force Range, Fla., Dec. 12, 2012. The evacuation was part of a three-day training exercise that tested the ability of the Airmen to operate during hostile situations. (DoD photo by Staff Sgt. Jamal D. Sutter, U.S. Air Force/Released)