U.S. military and Coalition logistics leaders and experts discuss the next phase to equip and sustain the next stage defeating the Islamic State of Iraq and Syria during the Operation Inherent Resolve Phase III Rehearsal of Concept, or ROC, drill at the U.S. Central Command forward headquarters at Al Udeid Air Base, Qatar, April 5, 2017. The drill focused on ensuring the multinational joint logistics enterprise remains postured and enabled to support known and emerging requirements as the conflict continues following the liberation of Mosul. (U.S. Air Force photo by Staff Sgt. R. Alex Durbin)