The Northrop Grumman B-2 Spirit is a terrifying piece of military kit. The stealth bomber can fly undetected for many thousands of miles to drop a thermonuclear bomb on pretty much any target on the planet. According to one government estimate, each B-2 in operation on average has cost the US Air Force $2.1bn to develop and deploy.
诺思罗普•格鲁曼公司(Northrop Grumman) B-2“幽灵”是一种可怕的军事装备。这种隐形轰炸机能够在不被发现的情况下飞行数千英里，向地球上几乎任何一处目标投放一枚热核炸弹。根据某一项政府估算，每架服役的B-2轰炸机的开发和部署花费了美国空军21亿美元。
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