1 Military Day
A United States Air Force Military Training Instructor from the 323rd Training Squadron forms up his flight prior to marching them out for morning physical training at Joint Base San Antonio-Lackland, Texas, April 8, 2015. Known as the "Gateway to the Air Force," all enlisted Airmen complete basic military training at Lackland, where more than 30,000 new Airmen graduate every year. (U.S. Air Force photo/Tech. Sgt. Trevor Tiernan)

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