A U.S. Air Force pilot checks an oxygen mask on a KC-135 Stratotanker before a mission supporting Combined Joint Task Force-Operation Inherent Resolve over the U.S. Central Command area of responsibility, April 10, 2021. The KC-135 delivers U.S. Air Forces Central a vital global reach aerial refueling capability to support joint and coalition aircraft throughout the USCENTCOM AOR. CJTF-OIR enables its partners to ensure the enduring defeat of the Islamic State group in designated areas of Iraq and Syria and sets conditions for follow-on operations to increase regional stability. (U.S. Air Force photo by Staff Sgt. Sean Carnes)