>> and that wasn't hostile. imagine if this was a hostile attack. we've been fighting this silent digital war for 20 years. people didn't want to talk about it because we didn't want people to understand that it's going on. imagine if a computer hacker from outside of iran can get inside iran, take control of the computer, and shut it down at their energy facilities. martha: that would be helpful. >> it would be helpful, but also remember that they can do that to us. they can take over your atm and suddenly all your digital records are gone. it's a serious problem. energy, transportation, everything is computerized. martha: it reminds me so much of growing up in the cold war years. it's as if we're at a mutually insured destruction stage of all of this. we look at them and say, we can do it to you. and they look at us and say, we could do it to you too. do we know who is more powerful at this stage? >> this e battle has been going on for so long in secret that i'm not sure that we do. one thing that we do know is