"The Nuclear Security Summit was President Obama's initiative born out of his vision to leave behind a safer, more prosperous world for the future generation."

"Yes, I don't believe that the inter-Korean relationship has, quote, 'deteriorated' since I assumed office. Rather I believe that the relationship between the two Koreas is entering into a new phase - a time of transition. And so I think that the North Koreans are trying to see what they can build with this, with my new administration."

"I think within Japan there is talk about how there is the need to reassess the future of the U.S.-Japan alliance."

"What we have is North Korea still pursuing path to a nuclear weapon state. So the majority of people's trust in North Korea has gone down considerably."

"You can't test courage cautiously."

"If the markets had behaved badly, that would obviously add to people's sense of alarm... but there has been a lot of reassurance coming, particularly in the way the Brits handled all this. There seems to be no great fear that something like that is going to happen here."

"When we are unwilling to draw clear moral lines between free societies and fear societies, when we are unwilling to call the former good and the latter evil, we will not be able to advance the cause of peace because peace cannot be disconnected from freedom."

"Most of us have far more courage than we ever dreamed we possessed."