Radio Call Air Force Lt. Col. Rob Marshall radios to Denali National Park Service rangers to get help for a sick climber during a trip from May 28-June 15, 2021. The climber was airlifted off the mountain at 19,500 feet. SHARE: Download: Full Size (0.03 MB) Credit: Air Force Lt. Col. Rob Marshall VIRIN: 210722-O-D0439-061.JPG Photo Gallery