The North American XB-70 "Valkyrie" was conceived for the Strategic Air Command in the 1950s as a high-altitude waveriding bomber that could fly three times the speed of sound (Mach 3). Two aircraft were built and flew test flights in the 1960s.The Valkyrie was configured as a canard delta wing, and built largely of stainless steel, honeycomb sandwich panels, and titanium. It was designed to make use of a phenomenon called "compression lift", achieved when the shock wave generated by the airplane flying at supersonic speeds supports part of the airplane's weight.

This plane is a huge sucker:
* Crew: 2
* Length: 185 ft 10 in (56.6 m)
* Wingspan: 105 ft 0 in (32 m)
* Height: 30 ft 9 in (9.4 m)
* Wing area: 6,296 ft² (585 m²)
* Empty weight: 210,000 lb (93,000 kg)
* Loaded weight: 534,700 lb (242,500 kg)
* Max takeoff weight: 550,000 lb (250,000 kg)
* Powerplant: 6× General Electric YJ93-GE-3 turbojet, 31,000 lbf (133 kN) each