Sound Barrier

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A U.S. Air Force B-52 carries the X-51 Hypersonic Vehicle out to the range for a launch test from Edwards AFB, California in this handout photo provided by the U.S. Air Force on May 1, 2013. REUTERS/Bobbi Zapka/USAF/Handout via Reuters

Get Ready for Unstoppable, Deadly Hypersonic Weapons

Stories From Sound Barrier

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A Flying Bullet: The Bell X-1 Busted Through the Sound Barrier

A U.S. Air Force B-52 carries the X-51 Hypersonic Vehicle out to the range for a launch test from Edwards AFB, California in this handout photo provided by the U.S. Air Force on May 1, 2013. REUTERS/Bobbi Zapka/USAF/Handout via Reuters

Get Ready for Unstoppable, Deadly Hypersonic Weapons