Bumping Fists Air Force Brig. Gen. Jeffrey Pennington, Fourth Air Force commander, greets two airmen following training at the Tactics and Leadership Nexus, Dover Air Force Base, Del., Oct. 17, 2020. SHARE IMAGE: Download Image: Full Size (2.7 MB) Tags: training, lethality, air force Photo By: Air Force Tech. Sgt. Jensen Stidham VIRIN: 201017-F-SX095-9009F.JPG Photo Gallery