US government wanted to reverse-engineer alien ships — but never found any, Pentagon UFO report reveals

Aerial view of a military building, The Pentagon, Washington DC, USA. — The Pentagon, Washington DC, USA.

(Image credit: Glowimages via Getty Images)

The U.S. government is not hiding aliens or their spaceships — although it did once propose a program to reverse-engineer any hypothetical alien technology it found, a Department of Defense (DOD) report reveals.

The Pentagon report, a highly anticipated review of classified documents from 1945 to 2023 that was submitted to Congress Friday (March 8), found no evidence that the U.S. government has encountered aliens or covered up their existence.

There is "no verifiable evidence for claims that the U.S. government and private companies have access to or have been reverse-engineering extraterrestrial technology," Maj. Gen. Pat Ryder, the Pentagon press secretary, said in a statement after the report's release. The report also found "no evidence that any U.S. government investigation, academic-sponsored research, or official review panel has confirmed that any sighting of a UAP [unidentified aerial phenomenon] represented extraterrestrial technology."

The U.S. government's renewed interest in UFOs came after a 2017 leak of three now-infamous video clips that appeared to show mysterious, wingless aircraft flying at hypersonic speeds past dumbfounded U.S. Navy pilots. In 2020, the U.S. Senate Select Committee on Intelligence called for an inquiry into UFOs, and in June 2021, the Pentagon released a report on more than 140 UFO sightings by Navy pilots. That report concluded there was no evidence of alien activity in any of the instances.

Despite those findings, the government's interest in UFOs drove news outlets and social media sites into frenzies of speculation. The conspiracy theories reached their apex when, in July 2023, David Grusch, a former U.S. intelligence official and whistleblower, claimed that the government had been secretly investigating crashed UFOs. In his congressional hearing, Grusch told the House Committee on Oversight and Reform that not only had spaceships been recovered but that "nonhuman" beings had been found inside.

"This proposal gained some initial traction at DHS to the point where a 35 Prospective Special Access Program (PSAP) was officially requested to stand up this program, but it was eventually rejected by DHS leadership for lacking merit," the report said. "It is critical to note that no extraterrestrial craft or bodies were ever collected — this material was only assumed to exist by Kona Blue advocates and its anticipated contract performers."

Ben Turner is a U.K. based writer and editor at Live Science. He covers physics and astronomy, tech and climate change. He graduated from University College London with a degree in particle physics before training as a journalist. When he's not writing, Ben enjoys reading literature, playing the guitar and embarrassing himself with chess.