众所周知,U-2是由美国洛克希德·马丁公司研制的久负盛名的单发高空战略侦察机。U-2飞机最活跃的年代在20世纪五、六十年代美苏两个超级大国冷战时期,曾经被美国作为秘密武器,用来执行间谍飞行任务,侦察前苏联和其它国家的后方纵深目标。在当时,由于U-2飞机的飞行高度高达20000米以上,地面高射炮根本奈何不了,而其它战斗机也无法在同一高度飞行,因此该飞机经常深入其它国家领空,进行间谍活动,直至1960年5 As we all know, U-2 is the prestigious single-altitude high-altitude strategic reconnaissance aircraft developed by the U.S. Lockheed Martin Company. The Most Active U-2 Aircraft During the Cold War, the two superpowers of the United States and the Soviet Union in the 1950s and 1960s were used by the United States as a secret weapon to carry out spy flight missions and scout the rear-end targets of the former Soviet Union and other countries. At that time, the surface anti-aircraft artillery was basically unable to justify any flight of the U-2 at a height of 20,000 meters and the other fighters were not able to fly at the same altitude. As a result, the aircraft often penetrated other countries’ airspace for spying until 5