A Palmetto M4 assault rifle is seen at the Rocky Mountain Guns and Ammo store in Parker, Colorado July 24, 2012. The killing of 12 people at a midnight screening of the new Batman movie in the Denver suburb of Aurora may spark a fresh round of soul-searching on America's relationship with guns but few predict any real change in the law. REUTERS/Shannon Stapleton (UNITED STATES - Tags: CRIME LAW SOCIETY)
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