On Dec 26, 1975 – Tu-144, the world's first commercial supersonic aircraft, surpassing Mach 2, went into service. https://t.co/8jmus0aeHc
On Dec 26, 1975 – Tu-144, the world's first commercial supersonic aircraft, surpassing Mach 2, went into service. https://t.co/8jmus0aeHc