这是个大事件

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Two men suspected of buying explosives they planned to detonate during protests in Ferguson, Missouri, once a grand jury decides the Michael Brown case, were arrested on Friday and charged with federal firearms offenses, a law enforcement official told Reuters.
Word of the arrests, reported by a number of media outlets Friday, came ahead of the grand jury's widely anticipated decision on whether the white police officer who fatally shot Brown, an unarmed black teenager, should be indicted on criminal charges.
The Aug. 9 slaying of 18-year-old Brown under disputed circumstances became a flashpoint for U.S. racial tensions, triggering weeks of sometimes violent protests in the St. Louis suburb by demonstrators calling for officer Darren Wilson's arrest.
一名执法人员向路透社称，周五，有两人因涉嫌购买ZD被拘捕，并被控犯下联邦非法携带枪械罪。此二人本打算大陪审团一宣判迈克尔·布朗一案，就在弗格森（隶属密苏里州）市内所进行的示威活动中引爆炸弹。
多家媒体机构报道了这则被捕讯息。在这之后，大陪审团亦将给出裁决，此决议备受瞩目，关乎这位白人警官是否应当被控有罪。而正是他，射杀了一位手无寸铁的黑人青年。
年仅18岁的布朗于八月九日丧生，而这起杀戮案件则颇具争议，并成为种族矛盾激化的导火索，从而引发了位于圣路易斯郊区长达数周之久的暴力示威活动，参与示威的民众要求逮捕警官达伦·威尔逊。