German Zarate-Durier, director of the Office of Diaconia (Mission and Service) of the Presbyterian Church of Colombia, preached the World Communion service at Columbia, focusing on how even a little faith the size of a mustard seed can produce amazing things. His work focuses on church development and the promotion of human rights. He works with social justice organizations, especially those devoted to victims of violence, and with the Presbyterian Accompaniment Program for Peace. Zarate-Durier is pictured at left with Catherine and Justo Gonzales, whom German has met on several previous occasions.