The Defense Department has demonstrated record-setting hypersonic speeds for cannon-launched guided projectiles during recent tests in New Mexico and Utah, part of an applied research project exploring the potential for use by the Army of a medium-range railgun for air and missile defense. General Atomics Electromagnetic Systems last week announced completion of what it called a “major test series” in collaboration with the Army and Navy on development of a gun-launched defensive projectile interceptor design. The demonstrations were part of...