library of congress building known here as the jefferson build coming is about a block away from the u.s. capitol. he claims to have a propane tank inside the vehicle and claims to be holding a detonator in his hand. now the authorities have not actually seen any explosive material at all. they have looked in the bed of the truck, the back part of the pickup truck. they don't see anything, but they have not been able to look inside the four-door cab of the truck to see if there is actually a propane tank. that's the claim that the man is making. he is communicating with them by writing on a dry erase board. the plastic board that you write on and then you can wipe off the ink and start all over again which is one reason why discussions with him are going slowly. he is known to law enforcement and they've been able to identify him now. we're not giving his name, but