The Pentagon has released archival footage and imagery from Apollo-era missions that suggests astronauts witnessed UFOs while on the moon.

Declassified transcripts from two Apollo missions show astronauts repeatedly describing unexplained lights and objects while orbiting and walking on the moon.

"The first unusual thing that we saw, I guess, was one day out or something pretty close to the moon. It had a sizable dimension to it, so we put the monocular on it," Aldrin said in July 1969, adding...