New Spain Library radar collision course incident

A GCA radar operator tracked two unidentified objects at 400-500 miles per hour on a collision course with an incoming C-47, and the objects made a turn immediately after the tower broadcast a warning.

“We had one interesting case from New Spay Library and, uh, this GCA operator was, uh, sitting there looking in his scope and all of a sudden he saw these two objects come in. They were coming in about 4 or 500 miles an hour. And at the same time a C-47 was coming in, he was going to land his 47. Well, he noticed they were on a collision course, so he called the tower and said, 'Tell those two unidentified airplanes they're on a collision course with this 47.' So the tower just called in the blind... The tower said there's no other airplanes out there. The radar man said, 'Yes, there is.' The tower just called in the blind and said, 'Uh, you two unidentified airplanes, you're on a collision course with a 47.' And just as they said that, these two returns made a turn.”

Verbatim from DOW-UAP-D154.pdf · View original on war.gov