.. even though it is old news. The stone cutting tool used was obviously not mechanical, but a device for separating the 'gluons' that hold atoms together. Remember watching a doc years ago, where a remote control buggy was sent up a long narrow 45 degree retangular tube, only to find it blocked by a separate block, held in place by copper pins, with no real way of releasing them. Very well designed to keep prying eyes out. Just hope when they open the secret chamber up they use the same methods that 'asbestos workers' use, so as not to release any harmful airborne substances! Wonder what they'll find?