US defense chief arrives in S. Korea for talks
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US Defense Secretary Robert Gates arrived Monday in South Korea on a trip to underscore Washington's firm alliance with Seoul as the two nations plan military exercises in a message of deterrence to North Korea.
Gates' visit comes amid continuing tension on the Korean peninsula over the March 26 sinking of the South Korean warship Cheonan that killed 46 sailors. South Korea has blamed the sinking on North Korea. (AP)
