Archives of Brazil began receiving from the Aeronautical Documentation and History Center part of the documentation of the Brazilian Air Force regarding the investigation of the appearance of UFOs in Brazil. Currently, this collection gathers cases between 1952 and 2016. Chile (c. 1968) In 1968, the SEFAA (previously CEFAA) began receiving case reports of the general public, civil aviators and the Chilean Air Force regarding the sightings or the appearance of UFOs in Chile, the initial work was an initiative of Sergio Bravo Flores who led the Chilean Committee for the Study of Unidentified Space Phenomena, supported even by the Chilean Scientific Society. Currently, the organization changed its denomination to SEFAA and its a department of the DGAC(Chile) which in turn depends on the Chilean Air Force. Canada (c. 1950) In Canada, the Department of National Defence has dealt with reports, sightings and investigations of UFOs across Canada. In addition to conducting investigations into crop circles in Duhamel, Alberta, it still considers "unsolved" the Falcon Lake incident in Manitoba and the Shag Harbour UFO incident in Nova Scotia. Early Canadian studies included Project Magnet (1950–1954) and Project Second Storey (1952–1954), supported by the Defence Research Board. United States Synopsis U.S. investigations into UFOs include: Project Blue Book, previously Project Sign and Project Grudge, conducted by the USAF from 1947 until 1969 The secret U.S. Army/Air Force Project Twinkle investigation into green fireballs (1948–1951) Ghost rockets investigations by the Swedish, UK, U.S., and Greek militaries (1946–1947) The secret CIA Office of Scientific Investigation (OS/I) study (1952–53) The secret CIA Robertson Panel (1953) The secret USAF Project Blue Book Special Report No. 14 by the Battelle Memorial Institute (1951–1954) The Brookings Report (1960), commissioned by NASA The public Condon Committee (1966–1968) The private, internal RAND Corporation study (1968) The private Sturrock panel (1998) The secret Advanced Aviation Threat Identification Program which was funded from 2007 to 2012. The Unidentified Aerial Phenomena Task Force, a continuing program within the United States Office of Naval Intelligence which was acknowledged in 2017. Thousands of documents released under FOIA also indicate that many U.S. intelligence agencies collected (and still collect) information on UFOs. These agencies include the Defense Intelligence Agency (DIA), FBI, CIA, National Security Agency (NSA), as well as military intelligence agencies of the Army and U.S. Navy, in addition to the Air Force. The investigation of UFOs has also attracted many civilians, who in