Kerry spoke at a press conference during a visit to Bulgaria on Thursday, reaffirming the United States' strong strategic partnership with Bulgaria.
5U.S. Sec. of State John Kerry's breath fogs in the cold night air after arriving in Sofia, Bulgaria, Jan. 15, 2015.
6U.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.