President Barack Obama called Dec. 14 -- the day a gunman in Newtown, Connecticut, killed himself and 27 others, mostly children - “the worst day of my presidency.” Photographer: Andrew Harrer/Bloomberg
President Barack Obama called Dec. 14 -- the day a gunman in Newtown, Connecticut, killed himself and 27 others, mostly children - “the worst day of my presidency.” Photographer: Andrew Harrer/Bloomberg
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