Fear: Trump in the White House by Bob Woodward:
At the G20 summit in Hamburg, Germany, in early July Trump wanted to talk with Australian prime minister Malcolm Turnbull. In violation of security rules he invited Turnbull into his Sensitive Compartmented Information Facility (SCIF). Only those with the highest U.S. security clearances for Top Secret Sensitive Compartmented Information were allowed in the SCIF. It was an absolute rule, intended to prevent someone planting listening devices. This facility, a large steel room, had to be torn down after the meeting.