Airmen from the 57th Munitions Squadron and 57th Weapons train to build and load the GBU-72 bomb. This guided bomb unit is a 5,000 lb penetrator that uses GPS-guided systems to accurately hit targets. SSgt Zachary Schaeffer, 57th Munitions Squadron, and TSgt Michael Velasco, 96th Test Wing, speak from both the AMMO and Weapons perspective. More