Dan Barker (born June 25, 1949) is a prominent American atheist activist who served as a Christian preacher and musician for 19 years but left Christianity in 1984. Barker received a degree in Religion from Azusa Pacific University and was ordained to the ministry by the Standard Community Church, California, in 1978. He served as associate pastor at a Religious Society of Friends (Quaker) church, an Assembly of God, and an independent Charismatic church. In 1984 he announced to his friends that he was an atheist. He is the current co-president with his wife Annie Laurie Gaylor of the Freedom From Religion Foundation, an American Freethought organization that promotes the separation of church and state. Barker is co-host of Freethought Radio, a Madison, Wisconsin based radio program for atheists, agnostics, and other freethinkers that has included interviews with Richard Dawkins, Sam Harris, Steven Pinker, Julia Sweeney, and Michael Newdow. His foundation published his book Losing Faith in Faith: From Preacher to Atheist, and he has written numerous articles for Freethought Today, an American freethought newspaper.