A UFO whistleblower shared new details of a Tardis-like craft in government possession during a secret meeting in New York City.

Decorated former Air Force intelligence officer David Grusch claims his sources worked on a 40-foot UAP that 'was the size of a football field' when they stepped inside, according to an attendee at the event.

The object could manipulate both space and time and use and could harness enough energy to power 70,000 homes a year, the source said.

DailyMail.com understands that guests included officials from the FBI, CIA, Department of Homeland Security, tech entrepreneurs and Wall Street 'bigwigs.'

All in, Grusch gave the talk to 60 people at a penthouse in Manhattan, and photos were banned from the event.

I'd sure like to know who those 60 people were.

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