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U.S. Secretary of State Rex Tillerson, center, visits with U.S. Gen. Vincent K. Brooks, commander of the United Nations Command, Combined Forces Command and United States Forces Korea, right, at the border village of Panmunjom, which has separated the two Koreas since the Korean War, South Korea, Friday, March 17, 2017. (AP Photo/Lee Jin-man, Pool)
U.S. Secretary of State Rex Tillerson, center, visits with U.S. Gen. Vincent K. Brooks, commander of the United Nations Command, Combined Forces Command and United States Forces Korea, right, at the border village of Panmunjom, which has separated the two Koreas since the Korean War, South Korea, Friday, March 17, 2017. (AP Photo/Lee Jin-man, Pool)

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Tillerson talks tough ahead of China meeting

Kristie Lu Stout speaks to Professor Dong Wang as the U.S. Secretary of State heads to China, threatening sanctions against those dealing with North Korea

Tillerson talks tough ahead of China meeting

Kristie Lu Stout speaks to Professor Dong Wang as the U.S. Secretary of State heads to China, threatening sanctions against those dealing with North Korea