Thank you, United States Government--I knew I wasn't crazy!
A new FBI site, The Vault, is an electronic reading room that has over 2,000 documents covering many different subjects. A memo written by the Special Agent in Charge of the Washington Field Office to the FBI Director on March 22, 1950 was discovered that confirms the Roswell UFO incident in 1947:
According to Mr. (redacted) informant, the saucers were found in New Mexico due to the fact that the Government has a very high-powered radar set-up in that area and it is believed the radar interferes with the controlling mechanism of the saucers. No further evaluation was attempted by SA (redacted) concerning the above.