An off-duty police officer tried in vain to prevent Saturday's crash of a 300-passenger train that hit a car at a rail crossing in southern England, killing seven people, police say.

据警方透露，本周六一辆载有三百多名乘客的火车在英格兰南部的一个路口与一辆小汽车相撞造成七人死亡。一名已下班的警察曾试图阻止这一事故，但未能成功。

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On Feb. 1, 2003, the space shuttle Columbia broke apart on reentry into Earth's atmosphere, killing all seven crew members.

2003年2月1日，哥伦比亚号航天飞机在返回大气层时解体，7名宇航员全部罹难。

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Forest rangers in northeast India say they've fought a seven-hour gun battle with heavily armed poachers but were unable to prevent them killing a rare one-horned rhinoceros.

印度东部部的护林员称与装备精良的盗猎者进行了7小时的格斗，但未能阻止他们猎杀一头稀有的独角犀牛。

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But that attempt was canceled after a storm caused a giant mass of snow to slide down the mountain, killing seven ethnic Sherpa guides.

VOA: special.2010.06.30

Police say the survivors exchanged gunfire with the insurgents, killing seven of the heavily armed guerrillas in the encounter Saturday night.

VOA: standard.2009.06.21

Instead,Balawi blew himself up at the meeting,killing seven agents of the Central Intelligence Agency and a Jordanian intelligence officer.

VOA: standard.2010.01.09

In November, Kenya accused al-Shabab of killing seven people in another grenade attack in the area.

BBC: Map locator

Last month, Kenya accused al-Shabab of launching a grenade attack on a bus in Eastleigh, killing seven people.

BBC: Nairobi's Somali area Eastleigh hit by fatal blast

Today's scheduled shuttle launch is the second since the shuttle Columbia broke apart three years ago, killing seven astronauts.

NPR: Is the Space Shuttle Worth the Effort?