This article first appeared in Aerospace Daily & Defense Report. SEATTLE -- Boeing's A160T Hummingbird unmanned rotorcraft flew for 18.7 hours on an overnight flight May 14-15, setting what the company believes is a world endurance record for a UAV in its weight class. The flight, which was accomplished at the U.S. Army's Yuma Proving Ground in Arizona, was one of two key performance tests set by the Defense Advanced Research Projects Agency (DARPA) to mark the completion of the initial...