Questions 51-60 are general questions that deal with the M-21/D-21. The challenge level ranges from easy to difficult.
When was the first flight of the M-21 with the D-21?
Who was the first person to fly the M-21/D-21?
When was the first launch of a D-21?
Where did the first flight of the M-21 take place?
What does the "M" and "D" stand for in M-21/D-21?
What engine did the D-21 use?
How fast was the D-21 designed to fly?
How many M-21s still exist?
How many D-21s were built?
How did M-21 #06941 crash?