PressTV... 3 The US Central Intelligence Agency has admitted that half of UFO sightings in the 1950s and 1960s were the country’s U-2 spy planes.
"Reports of unusual activity in the skies in the '50s? It was us," the CIA said in a tweet on Monday.
The agency explained that it was testing the spy planes at altitudes of over 60,000 feet. The figure was not believable at that time.
According to the spy agency, the document explaining that scenario was the most widely read document released this year by the CIA from their database.
The U-2 spy plane is flown by the United States Air Force now.
Some 104 U-2 spy planes have been built in total.
The Soviet Union shot down one of the planes in 1960 at 70,500 feet when it was trying to cross the country by going from Pakistan's air space then Norway's air space.
In 1997, The New York Times said in an article that the U-2 planes were developed to photograph targets from secret bases in California and Nevada.
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