<p>South Korea K-1 tanks fire live rounds during the largest joint air and ground military exercises on the Seungjin Fire Training Field in mountainous Pocheon, 20 miles from the Koreas' heavily fortified border, in South Korea on Thursday.</p>
December 24, 2010
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December 24, 2010 8 p.m.
War rhetoric rises between North and South Korea
SEOUL (AP) - One month after a deadly exchange of artillery fire, the two Koreas ramped up their rhetoric, with South Korea's president pledging unsparing retaliation if attacked again and a top North Korean official threatening a "sacred" nuclear war if provoked.