NASA published a photo of a leaflet that fell into the Utah desert in 2004 and explained that it was the remains of the Genesis spacecraft.
"His photo came from 2004 and no aliens were involved," NASA wrote in the photo.
The "flying disc" depicted in the photo is the return capsule of Genesis. The spacecraft was designed to study the sun and its mission began in 2001.
The incident when he returned to earth had a bad landing. The parachute does not open and land at speeds of more than 300 kilometers per hour.
Basically, NASA said there was no strange conspiracy theory behind the accident, and that "UFOs" that fell on Earth at that time were just other human constructs.