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Which bomber aircraft did North American Aviation develop as a supersonic replacement for the B-52?
XB-70 Valkyrie
B-1 Lancer
B-25 Mitchell
B-2 Spirit
Answer
The XB-70 Valkyrie was a prototype supersonic bomber developed by North American Aviation as a potential replacement for the B-52 Stratofortress. Capable of reaching speeds of Mach 3, the XB-70 was designed to fly at high altitudes to avoid enemy defenses. However, the program was eventually canceled due to budget constraints and a shift in military strategy.
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