RED HORSE Airmen pave the way
U.S. Air Force Staff Sgt. Christopher Lange, 823rd Rapid Engineer Deployable Heavy Operational Repair Squadron Engineers engineering technician, performs a concrete slump test during a training TDY at Seymour Johnson Air Force Base, N.C., July 26, 2013. The slump test is used to ensure uniformity between individual batches of concrete. (U.S. Air Force photo by Airman 1st Class Brittain Crolley)