| 1. | Deadliest shooting rampage in u . s . history claims 33 ; ' a tragedy of monumental proportions ' - - two attacks , two hours apart at virginia tech university , ending only when the killer shot himself , and questions about whether the school did enough to protect 在弗吉尼亚理工发生的米国史上最惨的校园枪击事件,同时被认为是具有里程碑意义的惨剧,两次袭击,两个小时间隔,仅仅由于杀手自挂才结束,让人疑问学校是否做了足够的安全工作 |