"US President Barack Obama speaks on the shootings in Aurora, Colorado at what was scheduled originally as a campaign event at Harborside Event Center July 20, 2012 in Fort Myers, Florida.  ""Such violence, such evil, is senseless. But while we will never know fully what causes somebody to take the live of another, we do know what makes life worth living,"" he told a somber crowd in Florida. Photo: Mandel Ngan, AFP/Getty Images"
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