"Many people have talked about military options with words like 'unimaginable'... I would probably shift that slightly and say it would be horrific... [A]nyone who's been alive since World War II has never seen the loss of life that could occur if there's a conflict on the Korean Peninsula.

"[I]t is not unimaginable to have military options to respond to North Korean nuclear capability. What's unimaginable to me is allowing a capability that would allow a nuclear weapon to land in Denver, Colorado. That's unimaginable to me. So my job will be to develop military options to make sure that doesn't happen."