Maduro vows to 'pulverize' opponents who dispute election results

Security forces in Venezuela are going door-to-door to round up opposition activists as part of a government crackdown called Operation knock-knock." Venezuela's opposition party insists it won last month's election, contradicting President Nicolas Maduro, who has declared victory. Alfredo Romero, head of the human rights organization Foro Penal in Caracas, discusses the situation with The World's Host Marco Werman.