5/22/2012 - An F-16 from Hill Air Force Base, Utah, releases a Guided Bomb Unit-31 over the Utah test range May 17 as part of Combat Hammer, a weapons system evaluation program. Aircraft from many different squadrons were on hand to participate in the air-to-ground evaluation conducted by the 86th Fighter Weapons Squadron, located at Eglin Air Force Base, Fla. The squadron hosts evaluations at Hill, Tyndall and Eglin each year, assessing weapon system performance, reliability, capabilities, and limitations in realistic combat scenarios against representative real-world targets. (Courtesy photo.)

5/22/2012 - A B-1B Lancer from Ellsworth Air Force Base, S.D., releases a Guided Bomb Unit-31 over the Utah test range May 17 as part of Combat Hammer, a weapons system evaluation program. Aircraft from many different squadrons were on hand to participate in the air-to-ground evaluation conducted by the 86th Fighter Weapons Squadron, located at Eglin Air Force Base, Fla. The squadron hosts evaluations at Hill, Tyndall and Eglin each year, assessing weapon system performance, reliability, capabilities, and limitations in realistic combat scenarios against representative real-world targets. (Courtesy photo.)

5/22/2012 - An F-16 from Hill Air Force Base, Utah, releases a Guided Bomb Unit-24 over the Utah test range May 17 as part of Combat Hammer, a weapons system evaluation program. Aircraft from many different squadrons were on hand to participate in the air-to-ground evaluation conducted by the 86th Fighter Weapons Squadron, located at Eglin Air Force Base, Fla. The squadron hosts evaluations at Hill, Tyndall and Eglin each year, assessing weapon system performance, reliability, capabilities, and limitations in realistic combat scenarios against representative real-world targets. (Courtesy photo.)

5/22/2012 - A B-1B Lancer from Ellsworth Air Force Base, S.D., flies over the Utah test range May 17 as part of Combat Hammer, a weapons system evaluation program. Aircraft from many different squadrons were on hand to participate in the air-to-ground evaluation conducted by the 86th Fighter Weapons Squadron, located at Eglin Air Force Base, Fla. The squadron hosts evaluations at Hill, Tyndall and Eglin each year, assessing weapon system performance, reliability, capabilities, and limitations in realistic combat scenarios against representative real-world targets. (Courtesy photo.)

5/22/2012 - An F-15 from the 389th Fighter Squadron releases a Guided Bomb Unit-31 over the Hill Air Force Base, Utah test range May 8 as part of Combat Hammer, a weapons system evaluation program. Aircraft from many different squadrons were on hand to participate in the air-to-ground evaluation conducted by the 86th Fighter Weapons Squadron, located at Eglin Air Force Base, Fla. The squadron hosts evaluations at Hill, Tyndall and Eglin each year, assessing weapon system performance, reliability, capabilities, and limitations in realistic combat scenarios against representative real-world targets. (Courtesy photo.)