>> kroft: one top u.s.al is on record saying that the chinese have already aggressively infiltrated the computer networks of some u.s. banks and are operating inside u.s. electrical grids, mapping out our networks and presumably leaving behind malicious software that could be used to sabotage the systems. can a penetrator, or a perpetrator, leave behind... >> mcconnell: yes. >> kroft: ...little things that will allow them to be there and watch and look... >> mcconnell: yes. >> kroft: and listen and...? >> mcconnell: any successful penetration has the potential for leaving behind a capability. >> kroft: do we believe that there are, that governments have planted code in the power grid? >> mcconnell: steve, i would be shocked if we were in a situation where tools and capabilities and techniques have not been left in u.s. computer and information systems. >> kroft: of all the critical components of the u.s. infrastructure, the power grid is one of the most vulnerable to cyber attack. that's because the power g

it's more to cover... >> kroft: ...to cover their rear?, to cover their rear. >> kroft: among the tests conducted was a pap smear, which is generally only recommended for much younger women, not an octogenarian who is already dying of liver and heart disease. >> fisher: in medicine, we have turned the laws of supply and demand upside down. >> kroft: what do you mean? >> fisher: supply drives its own demand. if you're running a hospital, you have to keep that hospital full of paying patients, in order to... you know, to meet your payroll, in order to keep the... you know, pay off your bonds. >> kroft: so, the more m.r.i. machines you have, the more people are going to get m.r.i. tests? >> fisher: absolutely. >> kroft: there are people that would argue this is great medicine. you get tested for every conceivable, possible malady you might have. >> fisher: often the best care is saying let's see how you do on this particular treatment for a couple of days and... and see if you respond, not necessarily doing a lot of tests. the best care may w

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