Two of the plaintiffs who challenged California's ban on gay marriage wed in Los Angeles. Paul Katami and Jeff Zarrillo of Burbank, California, were among the plaintiffs that went before the US Supreme Court this year.
"So many others like us did not stand for being treated as second class citizens", said Mr Zarrillo.
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As the silence came to an end the crowd began to applaud and people shouted "I am not afraid!" in defiance of the attacks.