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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Scientists have unveiled high-tech plans to preserve ancient sites in the Middle East at risk of destruction by the so-called Islamic State.
More is needed to help overcome poverty and inequality in New Orleans, 10 years after Hurricane Katrina devastated the area, Obama has said.
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