The legendary B-52 Stratofortress, behemoth of the sky built to fight the unthinkable war, nearly a century later the fleet ...

A Total Failure: The XB-70 Valkyrie was an experimental U.S. nuclear bomber developed in the 1950s and 1960s as a potential replacement for the B-52. Designed to fly at Mach 3 speeds and altitudes ...

Designed in the early 1960s to replace the B-52 Stratofortress, which still serves in the U.S. Air Force today, the XB-70 was retired in 1969. Only two prototypes were ever built. The new bomber ...

To meet these Air Force requirements Boeing will offer its XB-52, believed to look much like its six-jet B-47 medium bomber, now in production. The XB-52 has wings swept back at a 35° angle ...