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North American XB-70 Valkyrie
The
North American Aviation XB-70 Valkyrie
is the prototype of the
B-70
nuclear
-armed, deep-penetration
strategic bomber
for the
U.S. Air Force's
Strategic Air Command
.
North American Aviation
designed the Valkyrie bomber as a large, six-engined aircraft capable of reaching
Mach
3+ while flying at .
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