SAN FRANCISCO, CA: Judge Vaughn Walker, the U.S. District Judge who ruled in August that Prop 8, California’s voterapproved ban on same-sex marriage is unconstitutional, has announced he will retire from his post on the San Francisco federal court in February of 2011. Rich Wieking, clerk of the court, stated in an e-mail that Walker will step down from the bench on December 31st and retire in February.