https://tacairnet.com/2014/10/02/47-years-ago-today-the-fastest-manned-aircraft-flight-ever/
It flew at nearly Mach 7, seven times the speed of sound and twice the speed of a rifle bullet. The speed record it set 47 years ago today still stands today.
It flew so high its pilots earned Air Force astronaut wings: 280,500 feet or 53.1 miles above the earth.
It pioneered technologies that were used on the SR-71 Blackbird, the space shuttle and the reusable spacecraft in Richard Branson’s future Virgin Galactic passenger space program.
And it killed test pilots in an era before redundant flight control systems and modern safety protocols for hypersonic flight.
Actually October 2nd according to the article but still interesting.