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Rev. Katie Hotze-Wilton signs a Missouri marriage license after performing a marriage ceremony at City Hall in St. Louis in 2014. Missouri's ban on gay marriage was ruled unconstitutional before the U.S. Supreme Court legalized gay marriage in all 50 states last summer. Traditional family advocates at the World Congress of Families said Americans who disagree with the decision must continue to speak up. (Associated Press)

Susan Yoshihara teaches a workshop on strategic planning to delegates at the World Congress of Families. (Hannah McCulloch)

Luca Giueseppe Volonté addresses a crowd at the World Congress of Families IX. The panel of three addressed challenges to traditional families that come with a self-centered culture. (Bailey Fruit)

Youth delegates at the World Congress of Families participate in a session geared specifically to them. Some 300 young adults from different parts of the world received scholarships to participate in this year's event. (Allie Hamilton)