Lesbian couple Shelly Bailes, left, Ellen Pontac, right, who were married in 2008, laugh during a rally in front of a federal courthouse in San Francisco, Monday, Jan. 11, 2010. The first federal trial to determine if the U.S. Constitution prohibits states from outlawing same-sex marriage gets under way in San Francisco on Monday, and the two gay couples on whose behalf the case was brought will be among the first witnesses. (AP Photo/Paul Sakuma)
