ELLSWORTH AIR FORCE BASE, S.D. – Airman 1st Class Jordan Linial, 28th Munitions Squadron weapon loader, tightens a strap onto a guided bomb unit-31 during the phase II operational readiness exercise, July 21. A B-1B Lancer can fit 24 GBU-31s, which weigh 2,000 pounds each.(U.S. Air Force photo/Airman 1st Class Corey Hook)