contributing to the development of future supersonic aircraft like the Concorde SST. -One prototype now resides at the National Museum of the U.S. Air Force in Dayton, Ohio. XB-70 Valkyrie ...

Designed to replace the B-52, the Valkyrie boasted speeds exceeding ... that at such speeds and altitudes, the XB-70 would be impervious to enemy aircraft, which in the late 1950s, were the ...