The fastest and highest flying jet aircraft that still operated within the Earth’s atmosphere is the Lockheed SR-71 Blackbird.
Air Force Stratotanker Refuels Navy Super Hornets Over the Middle East
U.S. Navy F-18F Super Hornets from the "Mighty Shrikes" of Strike Fighter Squadron (VFA) 94 assigned to Carrier Air Wing 17, deployed aboard the aircraft carrier USS Nimitz (CVN 68), are refueled by a U.S. Air Force KC-135 as they fly over the U.S. Central Command area of responsibility in support of Operation Inherent Resolve Oct. 2, 2020. The KC-135 Stratotanker delivers U.S. Air Forces Central a global reach aerial capability to support joint and coalition aircraft, that provide war-winning airpower throughout the USCENTCOM AOR. (U.S. Air Force video)