[CBS News] July 4, 2005--The United Church of Christ's rule-making body voted overwhelmingly Monday to approve a resolution that endorses same-sex marriage, making it the largest Christian denomination to do so.
http://www.christianpost.com/article/church/2147/section/ucc.becomes.first.mainline.church.to.endorse.gay.marriage/1.htm UCC Becomes First Mainline Church to Endorse Gay Marriage - The Christian Post
United Church of Christ rule-making body passes resolution in favor of gay marriage - SignOnSanDiego.com
United Church of Christ Backs Same-Sex Marriage - HeraldTribune.com
Will the Episcopal Church USA join the UCC in endorsing gay marriage in 2006?