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Lockheed Martin is pitching proposals to give the iconic aircraft upgraded sensors and data links, as well as the ability to carry three different intelligence gathering systems all on the same mission. Our good friend Stephen Trimble, head of Flightglobal's Americas Bureau, was first to get the new details after getting an exclusive tour of Lockheed Martin’s Site 2 hangar, part of the company’s facilities in Palmdale, California earlier in March 2018. Site 2 is home to the firm’s U-2 program and is where it performs heavy depot maintenance on the planes for the Air Force. As a rule, the service sends each U-2 to the facility for a full overhaul approximately every 4,800 flight hours.