few overgrown trees disrupted the grid. that entire state lost power. airports shut down, wall street stopped trading. and that was nothing according to a new book that argues that the u.s. is now more vulnerable than ever to a cyber attack that could blanket this country in darkness without heat, working water, working toilets, working medical equipment for up to two years. legendary journalist ted koppel investigated just how unprepared such an attack.es is to defend - lights out, ted, my former boss, thanks for joining me today. >> i was never your former boss, but thank you. >> i answer to your show when i reported to "night line," you were my boss. let's move onto more important matters. you suggest in the book that our power grid could not have been designed worse if our enemies had built it. explain exactly what you mean. where are these vulnerabilities? >> well, the vulnerabilities lie in the internet. the internet is one army intelligence officer told me was designed so that professors