Documented sightings reporting a fireball-shaped craft.
U.S. Embassy officials and numerous residents of Tunis observed a full-moon-sized green-blue two-part flying object that exploded into a greenish circular cloud over the Tunisian capital.
A 1949 Los Alamos conference transcript in which Manhattan Project physicists tried and failed to explain the 'green fireball' wave over the Southwest's nuclear laboratories. Released via PURSUE Release 04.
A 10-15 megaton airburst flattened 2,150 km² of Siberian forest with no impact crater - the first modern aerial anomaly to provoke published speculation about extraterrestrial craft.