4/2/2012 - Staff Sgt. Bobby Brewer, of the 46th Maintenance Group, and more than 20 other Airmen perform “mountain climbers” during a physical training leader class March 30 at Eglin Air Force Base, Fla. PTLs lead their flights and squadrons in group PT sessions during the week throughout the base. (U.S. Air Force photo/Samuel King Jr.)

4/2/2012 - Staff Sgt. Bobby Brewer, 46th Maintenance Group, and more than 20 others perform a side bridge during a physical training leader class March 30 at Eglin Air Force Base, Fla. PTLs lead their flights and squadrons in group PT sessions during the week throughout the base. (U.S. Air Force photo/Samuel King Jr.)

4/2/2012 - More than 20 Airmen perform linear drills during a physical training leader class March 30 at Eglin Air Force Base, Fla. PTLs lead their flights and squadrons in group PT sessions during the week throughout the base. (U.S. Air Force photo/Samuel King Jr.)

4/2/2012 - More than 20 Airmen perform linear drills during a physical training leader class March 30 at Eglin Air Force Base, Fla. PTLs lead their flights and squadrons in group PT sessions during the week throughout the base. (U.S. Air Force photo/Samuel King Jr.)