Navy ditches futuristic railgun, eyes hypersonic missiles

The U.S. Navy pulled the plug, for now, on a futuristic weapon that fires projectiles at up to seven times the speed of sound using electricity.

Navy ditches futuristic railgun, eyes hypersonic missiles
The U.S. Navy pulled the plug, for now, on a futuristic weapon that fires projectiles at up to seven times the speed of sound using electricity.