top-secret

Trump has likened the new initiative to the Manhattan Project, a top-secret World War Two programme to develop the first nuclear weapons.

In that role, he had top-secret security clearance.

“How can you break into this top-secret project?”

They have now grown to about 5ft tall, the BBC discovered on a visit to the top-secret greenhouse where they are kept.

Earlier that day in Octobert 1969, he had opened the safe in his office at Rand in Santa Monica, where he worked as an analyst, and removed the first batch of top-secret papers.