Hangar View Airmen wearing protective gear participate in a simulated post-attack reconnaissance sweep in a hangar at Travis Air Force Base, Calif., Jan. 31, 2018. Air Force photo by Master Sgt. Joseph Swafford SHARE IMAGE: Download Image: Full Size (3 MB) Photo By: Master Sgt. Joseph Swafford VIRIN: 180131-F-QN515-0043A.JPG Photo Gallery