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4:31 pm
Mon August 20, 2012

Why Did The Hypersonic 'Waverider' Crash?

Originally published on Mon August 20, 2012 6:02 pm

The U.S. Air Force is investigating what happened to the X-51 Waverider aircraft that fell into the Pacific last week. The X-51 is part of an Air Force/DARPA research project trying to build a "scramjet" engine that will work at hypersonic speeds. NPR's Larry Abramson reports.