North Korea is warning of a nuclear attack against the United States. We look at how realistic the threat is, and how things have escalated in the Democratic People's Republic of Korea.

Related Links:

The New York Times article on North Korea Moves Missile to Coast, but Limited Threat Seen

TIME magazine article on North Korea Clears Its Military to Attack U.S. with Nuke

CNN article on U.S. reducing rhetoric that feeds North Korean belligerence

The Wall Street Journal article on North Korea Moves Missile to Its East Coast

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