challenge: What was the primary mission of the 6021st Reconnaissance Squadron during the Cold War?
  
  A. Conducting covert operations in Southeast Asia
  B. Monitoring the Soviet Union's military presence in Eastern Europe
  C. Providing air support for NATO forces in Western Europe
  D. Monitoring the 1953 Cease-Fire in Korea and the Korean Demilitarized Zone (DMZ)
  Answer: 