CIA published documents about strange objects in the mid-20th century
The Central Intelligence Agency published a document confirming what was said to be an unidentified flying object (UFO) in the 1950s and 1960s, essentially a reconnaissanceThe 21st century super modern spy planes
During the Cold War, SR-71 and U-2 spy planes were the main aerial exploration weapons of American superpower. What about the 21st century?