>> reporter: the flowers are clear. when you look at what happens, when you log on to the state-run media web site. that is the page they communicate to the world. on that web site, when you log in, depending on the time, you get an error page, that blank error page or one time, we saw the bizarre pink flower. the flower that blooms in spring here in korea. that is a bit of a clue it may be an outside hacker. somebody familiar with what that flower does here in korea. >> from the perspective of the united states, we may see the response that the united states will give to north korea and they are not laying out what they could do next. let me ask you this about the south korean nuclear plant getting hacked. what do we know about that?