In a situation that UFO enthusiasts refuse to let die (with good reason):

Eyewitnesses claim that something moved across the sky and crashed in the woods about 40 miles southeast of Pittsburgh in December 1965. Traffic was tied up in the area and curiosity seekers were kept away by soldiers. After a search, the Air Force said the likely explanation was a meteor, but nothing was found.

NASA is being forced to dig up more documents regarding this incident, better known as the Kecksburg Incident. Read the article here.