Kerry spoke at a press conference during a visit to Bulgaria on Thursday, reaffirming the United States' strong strategic partnership with Bulgaria.
ລມຕ ຕ່າງປະເທດ John Kerry ຢ້ຽມຢາມ Bulgaria

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U.S. Secretary of State John Kerry holds onto Bulgarian Prime Minister Boyko Borisov as they walk around a patch of ice on the sidewalk after holding a joint news conference in Sofia, Bulgaria, Jan. 15, 2015.

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U.S. Secretary of State John Kerry speaks to the media after talks with Bulgarian Prime Minister Boyko Borisov in Sofia, Bulgaria, Jan. 15, 2015.

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U.S. Secretary of State John Kerry clasps hands with Bulgarian Prime Minister Boyko Borisov, after holding a joint news conference in Sofia, Bulgaria, Jan. 15, 2015.

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U.S. Secretary of State John Kerry poses with Bulgarian President Rossen Plevneliev for photos at the Bulgarian Presidency building in Sofia, Bulgaria, Jan. 15, 2015.