Marco Rubio says he's heard shocking 'firsthand' accounts of UFOs from top Pentagon officials

More whistleblowers in the Pentagon have come forward with 'first-hand knowledge' of secret UFO crash retrieval programs, US Senator Marco Rubio has revealed.

The Republican Florida Sen said officials with 'very high clearances' who have occupied 'high positions within our government' have come forward with 'first-hand knowledge or first-hand claims' of top secret Government programs.

Ex-Air Force officer David Grusch made worldwide news earlier this month when he claimed alien craft and bodies had been recovered and back-engineered by US officials.