. >> kroft: sean henry's job is to police potential targets all over the united states.director of the f.b.i. in charge of the bureau's cyber division. he told us that criminals have used the internet to steal more than $100 million from u.s. banks so far this year, and they did it without ever having to draw a gun or pass a note to a teller. >> kroft: the f.b.i. became famous stopping bank robberies. are there more bank robberies in terms of the amount of money stolen on the internet than there are guys walking into branches with guns? >> henry: absolutely. >> kroft: really? >> henry: yes, yes. i've seen attacks where there's been $10 million lost in one 24- hour period. if that had happened in a bank robbery, where people walked in with guns blazing, that would have been headline news all over the world. >> kroft: and the bank probably didn't want it known. >> henry: certainly when there's a network breach, the owners of the network are not keen to have it known that their network was breached because of their concern that it might impact their business. >> kroft: the