美国有线新闻 CNN 五角大楼正式发布3段UFO影片（在线收听）

Which of these stories made headlines in 1947? Flying Saucers Seen in Washington, Communism Declared in China, Barbie Doll Makes Debut, or First Corvette Introduced? A civilian pilot named Kenneth Arnold said he saw flying objects that a reporter mistakenly called flying saucers.

For decades, the U.S. military has been studying aerial encounters with unknown objects, aka UFOs. This week the Pentagon released three videos that were recorded during U.S. Navy training flights and they apparently show mysterious airborne objects captured by the planes infrared cameras.

One of the recordings was made in 2004. A pilot who saw that object said it moved rapidly in ways he couldn't explain. The other two clips were captured in 2015 and in one of those a pilot can be heard saying the object is a drone. So was it? The Pentagon says whatever was recorded remains unidentified and it didn't give any hints as to what it thinks the objects might have been.

The reason the military officially released the videos yesterday after they had been published without permission by other organizations, was to help clear up public debate over whether the videos were real and if there's any more to them. The military also wants to encourage pilots to report anything strange they see because any unauthorized object in the sky can be dangerous to aviators and U.S. military operations.