Penpa Tsering: Preserving Tibet's identity

It is more than 60 years since the Dalai Lama fled Tibet and set up a government-in-exile, hopeful of one day going back. Since then, China has banned any mention of the spiritual leader in his homeland, and there are reports of widespread human rights abuses. Sarah Montague speaks to the president of that self-declared government-in-exile, Penpa Tsering. Will he ever get to see his ancestral homeland, let alone govern it?