November 13, 2010. From left, background: Russian Prime Minister and Bulgarian Prime Minister Boyko Borissov attending the ceremony of signing Russian-Bulgarian agreements. Foreground: Deputy Minister of Health and Social Development Yuri Voronin, left, and Minister of Labor and Social Policy Totyu Mladenov, right, signing an agreement on applying the Treaty between Russia and Bulgaria on the Social Maintenance as of February 27, 2009.