Runners participate in the 100th Commander's Challenge Run at Joint Base Charleston - Air Base, Sept. 14, 2012. The Commander's Challenge is held monthly to test Team Charleston's fitness abilities. (U.S. Air Force photo/Airman 1st Class Ashlee Galloway)

Airman Basic Steven Gray, 373rd Training Squadron Det. 5, was the fastest male runner with a time of 14:23 during the 2.37-mile 100th Commander's Challenge Run at Joint Base Charleston - Air Base, Sept. 14, 2012. (U.S. Air Force photo/Airman 1st Class Ashlee Galloway)

1st Lt. Anne Marie Kemp, 14th Airlift Squadron, 437th Airlift Wing, finishes as the fastest female runner with a time of 17:27 during the 2.37-mile 100th Commander's Challenge Run at Joint Base Charleston - Air Base, Sept. 14, 2012. (U.S. Air Force photo/Airman 1st Class Ashlee Galloway)