We have been trying to work with the North Koreans to persuade them it's not in their interests and certainly the Korean peninsula's interests, South Koreans, as they have been part of this as well, uh, to pursue, uh, nuclear weapons.

Chuck Hagel, U.S. defense secretary, warned of a "real and clear" danger from North Korea as it was revealed that the Pentagon is sending an advanced ballistic missile defense system to Guam. This is from a press conference on April 3, 2013.