"Security" patrols stationed at polling places in Philly:
http://www.youtube.com/watch?v=neGbKHyGuHU
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Also see:
Black Panthers intimidate voters in Philadelphia with night stick:
http://www.youtube.com/watch?v=HzBVxP5wzCY
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Shock Photos: Candidate Obama Appeared And Marched With New Black Panther Party in 2007:
http://biggovernment.com/abreitbart/2011/10/03/shock-photos-barack-obama-with-new-black-panther-party-on-campaign-trail-in-2007/