The Presidential tent MAR 23 2011
The Sensitive Compartmented Information Facility is a tent designed to keep communications secure when the President is out and about.
Designed to withstand eavesdropping, phone tapping and computer hacking, Sensitive Compartmented Information Facilities -- also known as SCIFs -- are protected areas where classified conversations can be held.
They can be permanent enclosures within a building, or mobile areas set up when a world leader is on the move, to allow them to view sensitive documents or have secret conversations without any outsiders listening or hacking in.
Looking at the top photo...what about the floor? They don't have to worry about electronic eavesdropping from below? See also Cold War giants in tiny rooms.