Activists shout slogans in front of the Legislative Yuan to protest against the government's policy allowing the import of U.S. bone-in beef in Taipei January 5, 2010. Taiwan's parliament amended a food safety law on Tuesday to ban certain U.S. beef imports over widespread fears of mad cow disease, testing trade ties with Washington, just two months after opening the market. REUTERS/Pichi Chuang (TAIWAN - Tags: POLITICS CIVIL UNREST)