Police officers shield themselves against stones thrown by rioters in this Reuters photo taken on March 14, 2008 during the unrest in Lhasa, capital of southwest China's Tibet Autonomous Region. (Xinhua/Reuter Photo)
  A person who was wounded during the unrest in Lhasa receives medical treatment in a hospital in Lhasa, capital of southwest China's Tibet Autonomous Region, in this photo taken on March 16, 2008. (Xinhua/Chogo)