for more, i'm joined by michael leiter, director of the national counter terrorism center from 2008 to 2011. and rodney joffe, senior vice president at neustar, a cyber security provider for private and government clients. in 2009, he designed a scenario for a government exercise in how to defend against cyber-attacks. welcome to you both to this important topic. michael leiter, begin by describing what these hackers did that could temporarily disrupt these web sites. >> in this case, what they did was a disruptedenial of service attack and in layman's terms all that means is taking computers away from those banks and then flooding effectively the web sites of those banks so normal customers in the bank can't actually communicate, transfer funds and the like. the. >> warner: is there something that makes banks particularly vulnerable to cyber hacking? >> banks tend to be one of those industries that is prepared better than any other industry in the united states but we see here that they are still susceptible. and i think it's two things. one, they represent american power in the same