Kerry spoke at a press conference during a visit to Bulgaria on Thursday, reaffirming the United States' strong strategic partnership with Bulgaria.
Sec. State John Kerry in Bulgaria
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U.S. Sec. of State John Kerry's breath fogs in the cold night air after arriving in Sofia, Bulgaria, Jan. 15, 2015.
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U.S. Secretary of State John Kerry looks over the weapons carried by Swiss police posing for a picture with him as he departs Geneva, Switzerland, Jan. 14, 2015.