U.S Air Force Senior Airman Matthew Calloway,right, with the 355th Aircraft Maintenance Squadron, marshals an A-10 Thunderbolt II aircraft during the Combat Hammer air-to-ground weapon system evaluation program at Eglin Air Force Base, Fla., Feb. 19, 2014. The weeklong training was managed by the 86th Fighter Weapons Squadron, 53rd Weapons Evaluation Group.