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Lockheed Hypersonic Plane Hits Mach 20, Crashes Into Pacific

An unmanned hypersonic aircraft made by Lockheed Martin Corp. crashed into the Pacific Ocean after reaching about 20 times the speed of sound and flying for more than nine minutes, a Pentagon agency said.

The experimental Falcon Hypersonic Technology Vehicle 2, or HTV-2, lifted off today in a Minotaur IV rocket made by Orbital Sciences Corp. at 7:45 a.m. local time from Vandenberg Air Force Base in California, according the Pentagon’s Defense Advanced Research Projects Agency, which is funding the program and overseeing the tests. The agency announced the launch and mission updates on Twitter.