Frozen Defender Air Force Staff Sgt. Andrew Tidwell tests his rifle during an exercise in Grostenquin, France, Jan. 14, 2020. During Frozen Defender, the 435th Security Forces Squadron hones capabilities in a contested environment under harsh conditions. SHARE: Download: Full Size (2.6 MB) Tags: Air Force Credit: Air Force Staff Sgt. Devin Boyer VIRIN: 200114-F-EQ901-1293.JPG Photo Gallery