guns from 2006 to 2008. nearly 200 of the guns they say lost in common areas like bathrooms and bowling alleys. offenders will be disciplined and given extra trang. most of the guns are still missing. and don t be surprised if the security agent asks to check your palms the next time you re at the airport. the tsa about to begin a new testing on passengers for explosives. pete williams is with us from washington. how does this work? reporter: what s new is where they ll do it and to whom. this is where they take a little piece of paper and run it on your hand or baggage and put it into a you know, they rub your hand and put it into a machine to see if there s any residue on it. they ll now start doing this while you re standing in the line to get to the check point, in the check point itself and at the boarding gates. usually this is done as secondary security but now in the new places, as well. all right. pete williams, thank you.