U.S. Secretary of State Kerry speaks to media after talks with Bulgarian Prime Minister Borisov in Sofia

U.S. Secretary of State John Kerry (L) speaks to media after talks with Bulgarian Prime Minister Boiko Borisov in Sofia, January 15, 2015. U.S. Secretary of State John Kerry will encourage Bulgaria to rely less on Russian energy and to tackle corruption on Thursday as the two NATO allies announced the launch of an annual strategic dialogue. (REUTERS/Stoyan Nenov)