WASHINGTON, Feb 3 (Reuters) - U.S. House of Representatives Speaker Nancy Pelosi said on Thursday the United States has a moral duty to condemn China's rights abuses but she urged U.S. athletes not to risk angering the "ruthless" Chinese government, a day before the opening of the Beijing Olympics. Pelosi, speaking at a Congressional-Executive Commission on China hearing, said the International Olympic Committee "turns a blind eye" to Beijing's rights violations.