U.S. Air Force Reserve Senior Airman Kelvin Mwaniki, air transportation journeyman, 96th Aerial Port Squadron, gives a thumbs up in the run portion of his physical fitness assessment test at Little Rock Air Force Base, Ark., April 1, 2016. An outdoor or indoor track are available for runners depending on weather conditions at the time of testing. (U.S. Air Force photo by Master Sgt. Jeff Walston/Released)