U.S. Navy Railgun Makes Public Debut

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The railgun, a futuristic electromagnetic weapon that can fire a projectile at seven times the speed of sound, makes its public debut at the the U.S. Navy's Science and Technology Expo. Katharine Jackson reports. Credit: https://www.youtube.com/channel/UChqUTb7kYRX8-EiaN3XFrSQ

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