Whistleblower David Grusch provided information about documents exfiltrated from foreign intelligence agencies that a...

Whistleblower David Grusch provided information about documents exfiltrated from foreign intelligence agencies that allegedly indicate the U.S. government is operating a classified UFO crash-retrieval and reverse-engineering program. These documents are currently being withheld from Congress and the public. What other documents recovered from foreign intelligence agencies contain information about secret programs being kept from Congress and the public?