Born in an era of nuclear brinkmanship and Cold War paranoia, the XB-70 Valkyrie was engineered to outrun everything. Flying at Mach 3 and 75,000 feet, this bomber was designed to strike deep into ...
The B-70 Valkyrie was the United States’ most ambitious bomber — a supersonic giant capable of cruising at Mach 3 and soaring at 70,000 feet. But its promise came crashing down in a fiery accident ...