FORT MEADE, Maryland (AP) - UFO theorists are probing declassified National Security Agency files on the U.S. spy agency's website, hoping to find evidence that proves there is life beyond Earth.

The NSA hoped the documents released two years ago would quell suspicions that it harbored information about unidentified flying objects. Instead, thousands are looking at the documents, which include an article in the tabloid newspaper National Enquirer with the headline: "Take UFOs Seriously or Be Prepared for Sneak Invasion by Space Aliens."

"The fact that they're releasing this stuff and it's so blacked out, the theories just flurry," said John Greenwald, who has collected UFO documents from government agencies for more than five years and posts them on his Web site.

NSA staffers receive hundreds of written requests under the U.S. Freedom of Information Act, and the UFO queries are slowing everything, said Pamela Philips, chief of FOIA/Privacy Act Services for the agency.