Snowy Shelter Air Force Master Sgt. Cody Hallas builds an igloo during a field training exercise as part of a Canadian air operations survival course in Crystal City, Canada, March 10, 2023. SHARE: Download: Full Size (0.14 MB) Tags: Air Force, Canada Credit: Air Force Chief Master Sgt. Jeremiah Wickenhauser VIRIN: 230310-Z-F3885-1000M.JPG Photo Gallery