Security Silhouette Air Force Senior Airman Kyle Alvino holds security before a resupply airdrop during exercise Frozen Defender in Grostenquin, France, Jan. 16, 2020. The Defenders synced their mission sets with the 37th Airlift Squadron to practice night operations on the airfield. SHARE IMAGE: Download Image: Full Size (1.92 MB) Tags: training, Air Force, exercises Photo By: Air Force Staff Sgt. Devin Nothstine VIRIN: 200116-F-BT441-0224.JPG Photo Gallery