Airmen test their strength
A U.S. Air Force Airman participates in the swimming portion of the physical ability and stamina test at the Young Men’s Christian Association in Sumter, S.C., Dec. 10, 2014. For the PAST, aspiring pararescue, combat control, and special operations weather Airmen are required to perform three timed swims including two 25-meter underwater swims and one 500-meter surface swim. (U.S. Air Force photo by Airman 1st Class Diana M. Cossaboom/Released)