Deletion of 2011 Gansu school bus crash

Comment: major tragedy which received significant coverage and caused the Chinese government to issue the Schoolbus Safety Regulation (see http://www.bbc.com/zhongwen/simp/chinese_news/2011/12/111211_china_schoolbus.shtml). Doubtless  impact
Stance: keep
Cited policy: Wikipedia:Notability (WP:LASTING)