No one outside Tibet knows exactly what is going on there right now...

.... or at least I don't, but in case observers outside China are in any doubt: This is potentially big, big, very consequential news.

It would be out of character for the Chinese regime (which is relaxed about many things, but not at all about "separatism" in any form) and also contrary to fundamental Chinese doctrine for the government not to respond with very great force to whatever is happening in Lhasa. Among other things, this will certainly change the tone of international discussion about the Olympics, in which China has an enormous investment of pride and "face" and which are now less than five months away.

Again, it is too early and facts are too unclear to say much more with confidence. But as you follow the news, be aware that this is something that could matter a great deal in many ways. More later.