People wearing protective masks walk on a street in Kobe in western Japan on May 16, 2009. [Xinhua/AFP]
![People wearing protective masks walk on a street in Kobe in western Japan on May 16, 2009. [Xinhua/AFP]](http://images.china.cn/attachement/jpg/site1007/20090519/000bcdb95f1d0b7c4d0b09.jpg "People wearing protective masks walk on a street in Kobe in western Japan on May 16, 2009. [Xinhua/AFP]")