The Roswell Incident (July 1947) is New Mexico's most famous UFO event, but there are several others of note. The lore of the Aztec UFO Crash (March 1948), sometimes referred to as "the other Roswell", includes the recovery of numerous alien bodies. Unusual "green fireballs" over northern NM in the late 1940s were the subject of government investigation. The Farmington UFO "Armada" (March 15-18 1950) was witnessed by not only "fully half of the town's population" but also by others around northern NM. The Socorro UFO (April 1964) was witnessed by a police officer and seemed to involve the landing and takeoff of an unusual vehicle, with occupants. Dulce New Mexico, the locale of a purported underground alien base, continues to have reports of UFO sightings in the area. As there is no definitve physical evidence from any of these events all of them are part of the folkloric history of New Mexico.