The Olympic torch heads to Argentina on Friday, after protesters disrupted its journey in Paris and San Francisco. The torch's 20-nation global route has been attracting activists angered over China's human rights record — in particular, its grip on Tibet and its arming of Sudan's government.
After Argentina, the torch continues to a dozen other countries before arriving in China on May 4, ahead of the Summer Games in August.
Julie McCarthy discusses the tumultuous torch relay with Robert Siegel.
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