North Korea conducts third nuke test

Tuesday, February 12, 2013 | 7:11 a.m. CST; updated 9:53 a.m. CST, Tuesday, February 12, 2013

PYONGYANG, North Korea — Defying U.N. warnings, North Korea on Tuesday conducted its third nuclear test in the remote, snowy Northeast, taking a crucial step toward its goal of building a bomb small enough to be fitted on a missile capable of striking the United States.