Robert F. Kennedy Jr. explains why his voice sounds raspy and strained, causing difficulty when he speaks. Here's more about ...

Robert F. Kennedy Jr. has publicly disclosed his diagnosis with spasmodic dysphonia. Learn more about this rare voice ...

A sleek white aircraft became the first independently developed jet to break the sound barrier Tuesday, tearing through the ...

Boom Supersonic's XB-1 made history on Tuesday by becoming the first civil aircraft to break the sound barrier. Before ...

Boom's Supersonic XB-1 jet became the “world’s first independently developed supersonic jet” to break the sound barrier ...

About 35,000 feet (10,670 meters) over the Mojave Desert, northwest of Los Angeles, Boom Supersonic's XB-1 became the first ...

The Colorado-based company is aiming to build a Concorde-like supersonic aircraft—but has hurdles to clear before realizing ...

On its 12th test flight, the Boom XB-1 prototype broke the sound barrier three times and achieved a top speed of Mach 1.1.

A supersonic jet built by Boom Technology broke the sound barrier for the first time Tuesday, advancing its bid to resurrect ...

The aerospace company put its technology to the test today, breaking the sound barrier and reviving the dream of supersonic ...

Tuesday’s XB-1 flight marks the first human-piloted civil supersonic flight since Concorde’s retirement more than 20 years ...

The Boom Supersonic aircraft exceeded Mach 1 after taking off from the Mojave Air and Space Port in California for its highly ...