Capitol Hill lawmakers said Wednesday that UFOs could pose a pressing threat to America's national security, as the pols emerged from a highly classified briefing with Navy and FBI officials on the unexplained phenomena. Ahead of the release of a highly anticipated Pentagon report on unidentified flying objects before month's end, members of the House Intelligence Committee received a hush-hush sneak preview inside a SCIF, or "sensitive compartmented information facility." As for the existence of extraterrestrial life, the lawmakers largely left the secrets inside the surveillance-proof room, declining to tell reporters what they learned. But some did voice concerns that the UFOs " which may be espionage assets controlled by America's foreign adversaries, in a possible explanation just slightly less terrifying than the vanguard of an alien invasion " could pose a danger to national security. "We take the issue of unexplained aerial phenomena seriously to the extent that we're dealing with the safety and security of US military personnel or the national security interests of the United States, so we want to know what we're dealing with," said Rep. Sean Patrick Maloney (D-NY). Rep. Mike Quigley (D-Ill.) said that, if anything, the landmark report shows that UFOs are finally being taken seriously. "The stigma is gone," he said. "Now that's as big a change in policy as I've witnessed about this issue in my lifetime. So the fact that they are taking this sort of thing seriously for the first time, I think, is important."