Chief Master Sgt. of the Air Force James Cody presents a challenge coin to Staff Sgt. Carlos Perez, 90th Maintenance Operations Squadron, Nov. 14, 2014, inside a payload transporter on the U-01 training launch facility at F.E. Warren Air Force Base, Wyo. Perez was one of five Airmen recognized for outstanding achievements. (U.S. Air Force photo by Lan Kim)