I visited Tibet a decade ago and we travelled completely unhindered as far as we could tell. Conversations with locals told of the awful truth - Tibet had been subjected to a cultural purge focused in and around their religion. All the monesteries were gutted (the true administrative power in the region) and all dissenters cracked down upon. A truly awful chapter of recent history and one that will be looked back upon in shame, if indeed it gets a mention. The truth of the Chinese land grab is known by so few in the West. Blood awful, all of it.