The Night of the UFOs (Brazil) (1986)
On May 19, 1986, military radars across several Brazilian regions — São Paulo, Rio de Janeiro, Minas Gerais, Goiás — simultaneously detected 21 unidentified objects. The Brazilian Air Force scrambled F-5 and Mirage fighters to intercept them, but the objects accelerated away at speeds deemed impossible for any known aircraft.
Witnesses
Military, pilots, controllers
Why it endures
Simultaneous radar, visual AND military-pilot confirmation across multiple sites at once — considered one of the best-documented cases on Earth.
Official version (contested)
The Brazilian Air Force officially acknowledged the event without ever explaining it. No conventional explanation was accepted.