Participants begin the Commander’s Challenge Run May 3, 2013, at Joint Base Charleston – Air Base, S.C. The Commander's Challenge is held monthly to test Team Charleston's fitness abilities. (U.S. Air Force photo/ Senior Airman George Goslin)

Members of the 628th Logistics Readiness Squadron run in formation during the Commander’s Challenge Run May 3, 2013, at Joint Base Charleston – Air Base, S.C. The Commander's Challenge is held monthly to test Team Charleston's fitness abilities. (U.S. Air Force photo/ Senior Airman George Goslin)

Senior Airman Matthew Knopf, 628th Medical Group health service management technician, pushes towards the finish line during the Commander’s Challenge Run May 3, 2013, at Joint Base Charleston – Air Base, S.C. The Commander's Challenge is held monthly to test Team Charleston's fitness abilities. Knopf was the top male runner with a time of 18:57. (U.S. Air Force photo/ Senior Airman George Goslin)

Heather Coffman, 628th Force Support Squadron services technician, runs towards the finish line during the Commander’s Challenge Run May 3, 2013, at Joint Base Charleston – Air Base, S.C. The Commander's Challenge is held monthly to test Team Charleston's fitness abilities. Coffman was the top female runner with a time of 20:59. (U.S. Air Force photo/ Senior Airman George Goslin)

Col. Richard McComb, JB Charleston commander, poses with winners of the "Spirit Award" after the Commander’s Challenge Run May 3, 2013, at Joint Base Charleston – Air Base, S.C. The Spirit Award was given to the 628th Logistics Readiness Squadron. (U.S. Air Force photo/ Senior Airman George Goslin)