. Members of the Connecticut state police bow their heads during a memorial service for victims of the Sandy Hook Elementary School shooting at Newtown High School in Newtown, Connecticut, U.S., on Sunday, Dec. 16, 2012. Obama arrived in Newtown, Connecticut, two days after the tragedy and as authorities were still trying to piece together a motive for the second-deadliest mass shooting in the U.S. Photographer: Olivier Douliery/Pool via Bloomberg
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