分类： 关键事件

The Roswell UFO incident took place in the U.S. in June or July 1947, when an airborne object crashed on a ranch near Roswell, New Mexico. Explanations of what took place are based on both official and unofficial communications. Although the crash is attributed to a secret U.S. military Air Force surveillance balloon by the U.S. government, the most famous explanation of what occurred is that the object was a spacecraft containing extraterrestrial life. Since the late 1970s, the Roswell incident has been the subject of much controversy, and conspiracy theories have arisen about the event. The United States Armed Forces maintains that what was recovered near Roswell was debris from the crash of an experimental high-altitude surveillance balloon belonging to what was then a classified (top secret) program named Mogul. In contrast, many UFO proponents maintain that an alien craft was found, its occupants were captu...