NASA and Lockheed Martin’s X-59 reached speeds above Mach 1 while reshaping shockwaves to eliminate the traditional sonic boom. Instead of a loud explosion, the aircraft produces a much quieter “thump ...

DUBAI, Jan 22 (Reuters) - The cause of a large blast in Iran's Semnan province was determined as a fighter jet breaking the sound barrier on Monday, state media reported. Iranian state media had ...