A UFO mysteriously appeared on a US intelligence agency's logo in what officials later suggested had been a mistake.
The flying saucer was spotted on the new seal of the National Intelligence Manager-Aviation (NIM-Aviation], the main air element of the Office of the Director of National Intelligence.
A spokesman said someone had "erroneously posted an unofficial and incorrect logo", indicating that it may have been an internal prank.
NIM-Aviation works to assess potential security threats from the air.
It was involved in the compilation of a report to Congress last year on research into UFOs, which are referred to by the Pentagon as unidentified aerial phenomena (UAPs).