Caelum Incognitum — The interactive encyclopedia of ufology
Operation Prato (Brazil, 1977)
Cases, documents & milestones
A Brazilian Air Force investigation carried out in 1977-1978 in the state of Pará, around the town of Colares, after reports of lights attacking residents. It produced photographs and reports long kept secret, released in the 1990s-2000s. The file has been hailed as one of the best documented by a military.