Gil Caldwell

Rev. Gil Caldwell (far right) with Martin Luther King, Jr.
truthinprogress.com

In 2007, Methodist Reverend Frank Schaefer performed the marriage service for his son Tim's wedding.

The seemingly routine action dramatically altered Schaefer's career because the same-sex union was prohibited by the church. Schaefer’s performance of marriage vows put him at the center of a controversy. He was stripped of his credentials but after a trial, the defrocking was overturned.