A Joker Duathlon participant embarks on a 30k bike ride after finishing the initial 5k run at Holloman Air Force Base, N.M., April 25, 2015. After completing a 5k run and a 30k bike ride, the participants had to complete another 3k run to finish the marathon. Entrants signed up both as two person teams and by themselves. (U.S. Air Force photo by Airman 1st Class Aaron Montoya / Released)
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