BUILDING A 'BEAR' U.S. Air Force airmen work to build a small shelter system known as a BEAR, or Basic Expeditionary Airfield Resource, in a Jan. 16, 2008, exercise at Holloman Air Force Base, N.M. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 807379-P-RXC52-364.jpg Photo Gallery