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Bikers congregrate against a while authorities investigate the scene of a shooting at a Twin Peaks restaurant that left at least 9 dead and several others wounded, in Waco, Texas, May 17, 2015 (Credit: Waco Tribune-Herald/Rod Aydelotte)

Bikers congregrate against a while authorities investigate the scene of a shooting at a Twin Peaks restaurant that left at least 9 dead and several others wounded, in Waco, Texas, May 17, 2015 (Credit: Waco Tribune-Herald/Rod Aydelotte)