 Complete the following phrase:  With the introduction of intercontinental ballistic missiles and long-range Boeing B-52 Stratofortress bombers, SAC no longer required bases in the UK, and Reflex deployments ceased in 1965, but SAC bombers continued to visit, and the UK was used by the Lockheed U-2 and Lockheed SR-71 Blackbird reconnaissance aircraft. SAC Boeing KC-135 Stratotanker and McDonnell Douglas KC-10 Extender tankers based in the UK supported the abortive 1980 hostage rescue attempt in Iran and the 