An upgraded bomb, when falling, USES data from the global-positioning system in combination with laser and infra-red sensors to adjust a set of fins that work like aeroplane flaps.

这样一枚经过升级改进的炸弹被投下后，利用全球定位系统及激光和红外感应器提供的数据控制弹体上的一组翼片，其工作原理类似飞机襟翼。

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Mr Cromitie and his three accomplices were nabbed red-handed this week as soon as they had parked their bomb-laden cars outside the synagogue and centre.

本周，当他们刚把安装了炸弹的车辆停泊在教堂和中心外，Cromitie和他的3个同伙被当场抓获。

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They underlined that their intelligence services agreed on how far the Iranians had got with their programme but Mr Netanyahu made it clear his red line was Iran getting enough depleted uranium to be able to build a bomb whereas the president's is Iran actually deciding to build the bomb and getting near to achieving it.

BBC: Obama tries to reassure Palestinians