The North American XB-70 Valkyrie, a Cold War-era bomber, was a technological marvel designed to fly at Mach 3 and at 70,000 feet, circumventing Soviet air defenses through speed and altitude.

Key Points and Summary - Forget low-altitude carpet bombing—the B-52 bomber's future is as a standoff “missile truck” that slings precision weapons from outside S-400/S-500 envelopes. This might allow ...