The U.S. Air Force RQ-4B Global Hawk has a wingspan of 130.9 ft (39.9 m), which is longer than the wingspan of a Boeing 757 at 124.6 ft (38 m). RQ-4B is an unmanned aerial vehicle (UAV) surveillance aircraft and is arguably the largest military UAV flying regular missions as of 2015. It is powered by a single Rolls-Royce F137-RR-100 turbofan engine with a cruising speed of 357 mph, maximum range of 14,154 mi, and maximum altitude of 60,000 ft. The Global Hawk performs a similar role as the Lockheed U-2 and
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