This document discusses and compares three theories about the UFO incident that occurred in Roswell, New Mexico in 1947:
1) The official US government theory is that it was a crashed weather balloon, though later they claimed it was part of Project Mogul to spy on the USSR. However, this theory does not explain eyewitness reports.
2) Some believe it was a crashed Nazi experimental aircraft called the Nazi Bell. However, there is no evidence to support this theory.
3) The most widely accepted theory among UFOlogists is that it was an extraterrestrial spacecraft that crashed carrying alien bodies. Many eyewitnesses reported seeing unusual materials and symbols. While difficult to prove, this theory best