Rally in the Rockies 2021: Day 1 Published Sept. 15, 2021 By Maj. Ashley Walker 913th Airlift Group GUERNSEY, Wyo. -- Personnel conducted a high altitude, low opening jump during Rally in the Rockies 2021 exercise, Sept. 13, 2021, Guernsey, Wyo. HALO jumps are typically employed when stealth is necessary to infiltrate enemy territory. (U.S. Air Force photo by Maj. Ashley Walker)