The U.N. Security Council is calling North Korea's claim of a successful hydrogen bomb test a "blatant violation." Meanwhile, the White House says the claim is false. Author of "Nuclear Showdown" Gordon Chang joins CBSN with more insight.
Full ArticleCBS News Homeland Security Correspondent Jeff Pegues and CBS News Senior National Security Analyst Juan Zarate discuss..
CBS News national security analyst Juan Zarate, who studied North Korea as a deputy national security adviser to President George..
North Korea says it successfully conducted its first hydrogen bomb test. Earthquake monitors picked up a tremor, measured at a..