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Kerry: "We know" Assad regime behind chemical attack

U.S. Secretary of State John Kerry, responding to Charlie Rose's interview with Syria's President Bashar Assad, said the U.S. knows Assad's regime gave orders to prepare for a chemical attack, and knows where the rockets came from and landed. He said videos that "exploded" onto social media showing the carnage couldn't have been faked. Jeff Glor reports on Kerry's response remarks in London.