The religion, culture, language and identity of Tibet are "nearing extinction," according to the Dalai Lama today in a speech attacking China 50 years after an upheaval that caused him to flee Tibet for India. Last year, on the 49th anniversary of his departure, there was a widespread rebellion that led to brutal repression. This year, China has cracked down hard. But that could that could make matters worse. That's according to Steven D. Marshall, senior advisor and Tibet expert at the Congressional-Executive Commission on China, which monitors human rights for Congress and the President.