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The Pentagon has Top Secret-classified briefings and a Secret-classified video about an infamous UFO incident, the U.S. Navy said in response to a public records request.

In response to a Freedom of Information Act request sent by researcher Christian Lambright seeking more information on the incident, the Navy said it had “discovered certain briefing slides that are classified TOP SECRET. A review of these materials indicates that are currently and appropriate Marked and Classified TOP SECRET under Executive Order 13526, and the Original Classification Authority has determined that the release of these materials would cause exceptionally grave damage to the National Security of the United States.”

“We have also determined that ONI possesses a video classified SECRET that ONI is not the Original Classification Authority for,” the letter continued.

Motherboard independently verified the FOIA response with the U.S. Navy.

“The Department of Defense, specifically the U.S. Navy, has the video. As Navy and my office have stated previously, as the investigation of UAP sightings is ongoing, we will not publicly discuss individual sighting reports/observations,” Susan Gough, a Pentagon spokesperson, told Motherboard. “However, I can tell you that the date of the 2004 USS Nimitz video is Nov. 14, 2004. I can also tell you that the length of the video that’s been circulating since 2007 is the same as the length of the source video. We do not expect to release this video.”

Gough was not able to comment on the briefing slides, and when asked if the source video held by the Navy was a higher resolution, contained audio, or other data, she stated she was unable to provide any additional information.

Many in the UFO research community have speculated that it could be the enigmatic ‘Grailian’ full length raw copy of the original 2004 UAP footage. Popular Mechanics reported in November that several original witnesses of the Nimitz incident allegedly saw a longer higher resolution video of the UFO encounter. Gary Voorhis, a Petty Officer who served on the Princeton, a ship in Nimitz fleet, told Popular Mechanics that he “definitely saw video that was roughly 8 to 10 minutes long and a lot more clear.” Others, such as Commander David Fravor, have stated that longer videos of the incident probably do not exist.

Luis Elizondo, the former Pentagon staffer and the man who played a key role in making the Navy video public, told Motherboard that straightforward messaging does not seem to be the Pentagon’s strong suit. When the New York Times ran its 2017 story concerning the Nimitz UFO incident, it also broke the existence of $22 million dollar UFO investigation program called AATIP, the Advanced Aerospace Threat Identification Program, and that Elizondo, a career intelligence officer, ran the project. The Pentagon has repeatedly changed its story since then; as recently as last month, the Pentagon said that AATIP had nothing to do with UFOs.

“The Pentagon has a long history of sometimes providing inaccurate information to the American people,” Elizondo said. “This is true as recently as this week regarding the draft memo involving Iran, and two weeks ago when the press finally received the truth about Afghanistan despite 18 years of statements to the contrary.”

“As in the case involving UAPs, I can only hope that the inconsistent message is due to the benign results of a large and cumbersome bureaucracy and not something more nefarious like a cover-up or deliberate misinformation campaign,” Elizondo added.