Tech. Sgt. Mark Riley, combat response force member, 341st Missile Security Operation Squadron, participates in a rappelling exercise on Jan. 25, 2022, at the Cheyenne Fire Tower, Cheyenne, Wyo. Defenders from the 341st Missile Wing, 90th Missile Wing, and 91st Missile Wing attended a rappelling course on F.E. Warren Air Force Base, Wyoming, to learn new rappelling guidance and get certified in techniques such as knot tying, inspections, tower hookups and safety. (U.S. Air Force Photo by Airman Sarah Post)