 The 70th SRW's mission was to gather intelligence on a global scale as part of the strategic reconnaissance force of SAC.Equipped with Boeing RB-47E Stratojets, the wing conducted a variety of spectacular overflights of the Soviet Union during the 1950s, including overflying Murmansk.RB-47s had a fairly low operational ceiling of 40,000 feet and relied on speed, as opposed to altitude, to evade interception.