10/14/2026
On October 14, 1947, Captain Charles "Chuck" Yeager became the first person to officially break the sound barrier. Flying the experimental Bell X-1—which he nicknamed Glamorous Glennis in honor of his wife—Yeager reached Mach 1.06 at an altitude of more than 40,000 feet over the Mojave Desert. This historic achievement ushered aviation into the supersonic era and proved that human flight could safely exceed the speed of sound.
Image: Chuck Yeager with Glamorous Glennis, public domain courtesy of the NMUSAF