U.S. Government UFO Documents:
“UFO Documents Index”, 15 January 2009
(National Security Agency & Central Security Service,
U.S. Department of Defense, Washington, D.C.)

The NSA web page contains forty-two UFO documents:

http://www.nsa.gov/public_info/declass/ufo/index.shtml

(wikimedia.org image)










(wikimedia.org image)