Supersonic startup with big plans for Greensboro hit major milestone in 2025, unearthed new sources of funding.

The X-1’s fuselage was designed to resemble a .50 caliber bullet—one of the only shapes known to have stable flight at supersonic speeds.

In the 1940s, flight hit a wall—the sound barrier. This is the story of how the U.S. X-plane program shattered it. From deadly high-speed dives to the rocket-powered X-1, discover how Chuck Yeager and ...