WASHINGTON, DC - MARCH 27: People from both sides of the same-sex marriage issue gather in front of the U.S. Supreme Court, on March 27, 2013 in Washington, DC. Today the high court is hearing arguments on the constitutionality of the Defense of Marriage Act (DOMA), which withholds federal benefits from legally wed gay couples by defining marriage as only between a man and a woman. (Photo by Mark Wilson/Getty Images)