An Air Force RC-135 Rivet Joint reconnaissance aircraft is visible through the window of the boom operator's station aboard a KC-135 Stratotanker as it approaches for aerial refueling to support an Operation Freedom’s Sentinel mission over Afghanistan, Jan. 3, 2017. The 340th Expeditionary Air Refueling Squadron conducts tactical refueling operations, which extend capabilities across Southwest Asia. Air Force photo by Staff Sgt. Matthew B. Fredericks