Cuban dissident blogger Yoani Sanchez on Thursday chided Brazil for its silence on human rights violations in her country, and urged Brasilia to speak out. Sanchez, on a week-long visit to Brazil, told reporters here she had hoped for an "energetic stance" by the government, "which has tightened its ties" under ex-president Luiz Inacio Lula da Silva and his successor Dilma Rousseff with Cuba's communist regime.