Mobility Guardian An Air Force A-10 Thunderbolt II receives fuel from a KC-135 Stratotanker during Exercise Mobility Guardian 21, May 24, 2021. SHARE IMAGE: Download Image: Full Size (2.3 MB) Tags: air force, mobility guardian Photo By: Air Force Master Sgt. Larry Reid Jr. VIRIN: 210524-F-KA253-0145.JPG Photo Gallery