This week we celebrate the April 13 birthdays of two great freethinkers: Christopher Hitchens and Thomas Jefferson. Listen to a hilarious excerpt of Hitchens' 2007 talk to the Freedom From Religion Foundation. Then hear Dawn Brittain talk about her efforts to defend Jefferson's wall of separation between church and state, by trying to remove a cross from a war memorial in Coos Bay, Oregon. Bonus music: "Thank You, God," by Tim Minchin.