The USAF XB-70 Valkyrie: How much you know about it?

The North American Aviation (NAA) Los Angeles Division constructed the XB-70A for the United States Air Force as an experimental high-speed, delta-wing aircraft capable of flying at three times the speed of sound and at altitudes more than 70,000 feet.

At these speeds, it was expected that the B-70 would be practically immune to interceptor aircraft, the only effective weap0n against b0mber aircraft at the time.

The b0mber would spend only a few minutes over a particular radar station flying out of its range before the controllers could position their fighters in a suitable location for an interception.

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