Amid Tension, China Blocks Vital Exports to Japan - New York Times http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNEhUGm0RsyyV0w_Nd5ke4mxc_FFAg&url=http://feeds.nytimes.com/click.phdo?i%3Dbc218a9bb2a754788acb95c8d33556ca