| CNN.com delivers up-to-the-minute news and information on the latest top stories, weather, entertainment, politics and more. | Pentagon chief lands in South Korea | | There's only one reason the US will deploy the THAAD missile defense system in South Korea, Defense Secretary James Mattis said Thursday as he arrived in the country on his first overseas trip as Pentagon chief. |
| Trump, Tillerson and the South China Sea | | Rex Tillerson, who was sworn in as US Secretary of State Wednesday, takes responsibility for US policy in one of the world's biggest flashpoints: the South China Sea. |
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