Tibet issues is apparantely one of the major sensitive issues dogged Sino-US relationships. It is reported, Hu did not respond to all the questions including one on Liu Xiabo. Hu blamed on translation and technical problem when he appeared to be dodging questions on human rights when the first time by Associate Press, at the white house press conference.
http://www.washingtonpost.com/wp-dyn/content/article/2011/01/16/AR2011011601921.html?referrer=emailarticle
http://www.washingtonpost.com/wp-dyn/content/article/2011/01/16/AR2011011601921.html?referrer=emailarticle