Correspondence and Reports Regarding UAP Sightings in Brasília and Belém (1991)

This document collection comprises official correspondence, questionnaires, and internal reports from the Brazilian Ministry of Aeronautics, specifically the NUCOMDABRA and CINDACTA I, dating from 1991. The documents center on the investigation of Unidentified Aerial Phenomena (UAP) in the Brasília region, particularly near the Papuda Prison, and the historical context of the 'Operação Prato' (Operation Plate) conducted in the Amazon region during the late 1970s. The correspondence includes exchanges between the military and the University of Brasília's Ufology Study Group (GEU/NEFP), where the military provides technical explanations for sightings, often attributing them to meteorological balloons launched by the Ministry of Aeronautics. The documents include detailed witness questionnaires describing objects that hovered, changed color, and emitted light beams, with some witnesses reporting physiological effects such as paralysis and skin burns. A significant portion of the file is dedicated to the 'Operação Prato' report, which details the military's investigation into sightings in the Pará region, including reports of 'chupa-chupa' (sucker) phenomena. The military's official position, as articulated by Major Brigadier Ronaldo Eduardo Jaeckel, is that these sightings are largely misidentifications of routine atmospheric research equipment. However, the inclusion of the 'Operação Prato' report reveals a deeper, historical military interest in the subject, documenting extensive field research, witness interviews, and photographic evidence that contradicts the simplified explanations provided to the public. The documents highlight the tension between civilian ufologists seeking transparency and military authorities maintaining a policy of official silence or dismissal.