BOPE, short for Batalhão de Operações Policiais Especiais, Rio de Janeiro's special weapons and tactics team. The operation involves a visit to some of the town's favelas or slums where the police are trying to take back the streets from drug dealers and gangs.
http://www.youtube.com/watch?v=BAGljlQkjmI
http://t1.gstatic.com/images?q=tbn:ANd9GcTrraswGSOAIMVBk06j103_CbAW5udV5cYhkkVPnh0ytKrHCst0
http://www.youtube.com/watch?v=pAKB9Cx44hI&feature=related
http://www.youtube.com/watch?v=BAGljlQkjmI
http://t1.gstatic.com/images?q=tbn:ANd9GcTrraswGSOAIMVBk06j103_CbAW5udV5cYhkkVPnh0ytKrHCst0
http://www.youtube.com/watch?v=pAKB9Cx44hI&feature=related