Two-year-old John Austin runs on the flightline during his Pilot for a Day visit May 15, 2014, at Altus Air Force Base, Oklahoma. John was diagnosed with acute lymphoblastic leukemia when he was four months old, and his parents were told that he had a 45 percent chance of surviving to age 5. He has since completed treatment and has been in remission since December 2011. (U.S. Air Force photo/Staff Sgt. Nathanael Callon)
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