Imagine a bomber so fast it could outrun any fighter jet, soaring at Mach 3 speeds across continents. The XB-70 Valkyrie was this dream made real, pushing engineering to new heights. But its path was ...

With its six inline turbojet engines with afterburners, the Valkyrie could sustain speeds ... in up to 65 degrees to use shockwaves from the bomber's speed to provide additional lift.