Tibet Blows Up Before Beijing Olympics

China is pouring troops into Tibet, where violent protests have led to deaths, injuries and widespread property damage. The exiled Dalai Lama has threatened to step down if the violence continues and repeated his offer to speak with Chinese leaders who blame him for starting it all. Today, from his home in exile in Dharamsala, India, the Dalai Lama met with House Speaker Nancy Pelosi.  She said the visit had long been planned, but took the opportunity to denounce what she called "China's oppression of people in Tibet." Secretary of State Condoleezza Rice has urged "restraint" and "dialogue," but President Bush still plans to attend the Beijing Olympics. The games are providing an international forum for ethnic, religious and territorial disputes. What's at stake for China? Will Tibet see any change?