CNN CNN Newsroom With Carol Costello December 19, 2014 15:33:00
Attacked is nuclear power plants. so if they succeed in hacking the power plants it would be a very efficient way of threatening our government and achieving their goals. >> should america be prepared for north korea to try to break in to these types of agencies in america? >> translator: of course. even though the u.s. is one of the best prepared nations with u.s. cyber command, cyber attacks are hard to protect yourself from so they have to constantly be vigilant. >> reporter: if south korea is the practice ground, the big target for north korean hackers, u.s. infrastructure and government a...