In pictures: The US Navy's incredible, sci-fi railgun

Engineers at Naval Surface Warfare Center, Dahlgren Division, prepare to test the electromagnetic railgun. (U.S. Navy)

An engineer loads the railgun. (U.S. Navy)

The electromagnet railgun is prepped and ready to fire. (U.S. Navy)

A high-speed camera captures the first full-energy shots. (U.S. Navy)

The result: a weapon that can hit a target 100 miles or more away within minutes. (U.S. Navy)

Gary Bass, left, and Jim Poyner, from the Naval Surface Warfare Center, Dahlgren Division, take measurements after a successful test firing. (U.S. Navy photo by John F. Williams)

The gun is tested outdoors. (U.S. Navy)