Police guard the perimeter of the police headquarters before alleged Colombian drug lord Henry de Jesus Lopez, alias "Mi Sangre" or "My Blood," is escorted out in Buenos Aires, Argentina, Wednesday, Oct. 31, 2012. Lopez, a former paramilitary wanted in Colombia and the U.S., was arrested in suburban Buenos Aires on Tuesday. (AP Photo/Victor R. Caivano)

Associated Press
Police guard the perimeter of the police headquarters before alleged Colombian drug lord Henry de Jesus Lopez, alias "Mi Sangre" or "My Blood," is escorted out in Buenos Aires,  Argentina, Wednesday, Oct. 31, 2012.  Lopez, a former paramilitary wanted in Colombia and the U.S., was arrested in suburban Buenos Aires on Tuesday. (AP Photo/Victor R. Caivano)
Police guard the perimeter of the police headquarters before alleged Colombian drug lord Henry de Jesus Lopez, alias "Mi Sangre" or "My Blood," is escorted out in Buenos Aires, Argentina, Wednesday, Oct. 31, 2012. Lopez, a former paramilitary wanted in Colombia and the U.S., was arrested in suburban Buenos Aires on Tuesday. (AP Photo/Victor R. Caivano)
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