Demonstrators walk outside the Supreme Court in Washington, Tuesday, March 26, 2013, where the court will hear arguments on California's voter approved ban on same-sex marriage, Proposition 8. The Supreme Court waded into the fight over same-sex marriage Tuesday, at a time when public opinion is shifting rapidly in favor of permitting gay and lesbian couples to wed, but 40 states don't allow it. (AP Photo/Pablo Martinez Monsivais)
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