The XB-70 Valkyrie, a Mach 3-capable bomber developed during the Cold War, was designed to outpace Soviet air defenses. Powered by six turbojet engines, it could reach 2,076 mph at 73,000 feet.

The XQ-58A Valkyrie, developed by Kratos Defense & Security Solutions, is an innovative drone designed to cooperate with fifth-generation aircraft like the F-35 and F-22 Raptor. The drone has ...