denomination chips, 25,000 and below. martha: with those large denominations is there any sort of tracking device or identification on those chips that helps you if someone tries to now spend them? >> well, you know, i don't want people to forget that the las vegas casino industry has been in business for a very longtime, they certainly have safeguards and protocols in place in the event chips come up missing or are misused or disappeared. they have safeguards in place but it isn't anything we are going to discuss publicly. martha: lieutenant, have you seen anything like this before? >> one thing we got asked yesterday, is this a common occurrence. the answer to that is no. in 2009 we had nine casino robberies. the bellagio makes ten for this yearar. most of the events you can question the sobriety of most of the people who commit them. we do a fairly good job of catching them. we don't see a lot of this, this