1947 , Roswell Incident

It all started on June 25th, 1947. When a pilot named Kenneth Arnold reported seeing several objects while flying near Mt Rainier, Washington. His descriptions of the objects that flew like "geese" and moving "like a saucer would if you skipped it across the water" became the term "Flying Saucers", and thus the age of the UFO was born.

The Roswell UFO incident was a report of an object, allegedly a spacecraft containing extraterrestrial life, that crashed near Roswell, New Mexico, in June or July of 1947. Since the late 1970s the incident has been the subject of controversy, and conspiracy theories as to the true nature of the object that crashed.

 The United States Armed Forces maintains what was recovered was debris from an experimental high-altitude surveillance balloon belonging to a classified program named Mogul; many UFO proponents maintain that an alien craft was found. They also maintain that its occupants were captured, and the military engaged in a cover-up. The incident has turned into a widely known pop culture phenomenon, making the name Roswell synonymous with UFOs. It is the most publicized and controversial of alleged UFO incidents.

for more than 30 years,The incident was forgotten and almost completely ignored, even by UFO researchers,In 1978, physicist and ufologist Stanton T. Friedman interviewed Major Jesse Marcel, expressed his belief that the military covered up the recovery of an alien spacecraft. In February 1980, The National Enquirer ran its own interview with Marcel, garnering national and worldwide attention for the Roswell incident.

 Additional witnesses added significant new details, including claims of a huge military operation dedicated to recovering alien craft and aliens themselves, at as many as 11 crash sites, and alleged witness intimidation. In 1989, former mortician Glenn Dennis put forth a detailed personal account, wherein he claimed alien autopsies were carried out at the Roswell base.

( Wiki , Enigma )