The story is all too-familiar: on April 20, 2010, the Deepwater Horizon oil rig exploded, killing eleven workers and creating the largest oil spill in the history of U.S. offshore drilling.

故事是大家再熟悉不过的：2010年4月20日，“深水地平线”钻井平台爆炸，造成十一名工作人员死亡并成为美国近海钻探史上最大的石油泄漏事故。

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In cold climates, since the dawn of history, people have been killing animals and using their skin as clothing.

自历史黎明之际，寒冷的天气中，人们就开始猎杀动物，并用它们的毛皮做衣服。

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In Colombia months of heavy rain have caused widespread flooding, killing at least 312 people in the worst natural disaster in the country's history.

在哥伦比亚，持续数月的大雨造成遍地洪灾，在哥国这场史上最严重的自然灾害，至少312人丧生。

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Three of his students did a documentary for National History Day on the 1964 killing of three civil rights workers.

NPR: 'Mississippi Burning,' 41 Years Too Late

The Deepwater Horizon accident, in which an oil rig exploded killing 11 people, caused one of the worst oil spills in history.

BBC: BP faces temporary ban from new US contracts

For in Egypt, it was the moral force of nonviolence -- not terrorism, not mindless killing -- but nonviolence, moral force that bent the arc of history toward justice once more.

WHITEHOUSE: President Obama on a Historic Day in Egypt