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Which research aircraft was used by NASA for testing high-speed, high-altitude aeronautical research?

16. Which research aircraft was used by NASA for testing high-speed, high-altitude aeronautical research?

1. SR-68
2. SR-69
3. SR-70
4. SR-71

Answer

The correct answer is: D) SR-71

Explanation

SR-71 was the research aircraft used by NASA for testing high-speed, high-altitude aeronautical research. The SR-71 was also known as the "Blackbird".