On Tuesday, the Senate Intelligence Committee made the unusual request to ask the Pentagon for a detailed, unclassified report on unidentified aerial phenomena that some believe may not be of this world.

One expert thinks this may stem from lawmakers being "disturbed" by what they heard.

"I welcome this long-overdue development," Nick Pope, a former employee and UFO investigator for Britain's Ministry of Defense, said in an email to Fox News. "It suggests that those senators who received last year's classified briefing on UFOs were disturbed by it and weren't satisfied with the current DOD position, i.e. simply stating that the mystery objects encountered by naval aviators remain unidentified."

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