During a 2015 mission, a camera and sensor aboard a Navy F/A-18 Super Hornet jet tracks a fast-moving object and prompts the pilots to try to lock onto it.
The passionate phenomenon of UFO sightings and seekers has been around for decades, fueled by stories eye-witness accounts, including the famous story of a spacecraft that reportedly crashed in the New Mexico desert in 1947.
These videos are a select few of a number of recorded encounters between the US Navy and UFO's that the Department of Defense has unclassified and released.
The object continues at a fast rate, and the pilots appear to be amazed.
"It is time to set aside taboos regarding "UFOs" and instead listen to our pilots and radar operators".
In a Washington Post op-ed, Mellon, who now works at The Stars Academy of Arts and Science (TTSA), says some USA pilots have encountered a UFO and several have even caught footage of the occurrence, but not enough has been done about it. "Look at that flying!" said another.
"I have never seen anything in my life, in my history of flying that has the performance, the acceleration - keep in mind this thing had no wings", he said.
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Paul Pogba is set to return to Manchester United's starting line-up for Tuesday's Champions League tie against Sevilla . Giggs says the criticism started following the 0-0 Premier League draw with Liverpool at Anfield last October.
UFOs have been reported by the Navy and other branches of the military for decades.
The US government finally cut off funding in 2012 - having spent $22m a year over five years from 2008-2011 - although the programme was not officially shut down until the military intelligence official in charge quit his post in October 2017, the New York Times reported.
The new video comes soon after two other declassified videos of supposed UFO sightings by U.S. Navy pilots were published by The New York Times in December. Luis Elizondo, a former military intelligence officer who ran the secretive Advanced Aerospace Threat Identification Program at the Pentagon, is now the academy's director of global security and special programs.
Former United States Deputy Assistant Secretary of Defense for Intelligence Christopher Mellon, who now works with th group, said, 'Is it possible that America has been technologically leap-frogged by Russian Federation or China?
"We have no idea what's behind these weird incidents because we're not investigating", Mellon wrote.
He said one of the reasons it isn't investigated to the extent it should be is the stigma attached to UFOs.
Mellon then states that "nobody wants to be "the alien guy" in the national security bureaucracy" because those types of people are often "ridiculed or side-lined for drawing attention to the issue". "This is true up and down the chain of command, and it is a serious and recurring impediment to progress", he said.