WASHINGTON – The Obama administration is saying that the sinking of a South Korean warship blamed on North Korea was not terrorism, and not enough by itself to put the Pyongyang back on a U.S. terror blacklist. The State Department said Monday that the March sinking of the frigate Cheonan was a "provocative action" and a violation of the truce that ended the Korean war. But it added that the sinking by a reported North Korean torpedo strike was the act of one state's military against another.