Almost five years ago, America's Congress cut research funding for a controversial bunker-busting nuke called the Robust Nuclear Earth Penetrator.

几乎就在五年前，美国国会削减了一种引起争议的掩体核弹——坚实型核钻地弹——的研究经费。

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And the United States, which is working on new bunker-busting nuclear bombs, wants sanctions against North Korea and Iran.

NPR: Weak Prospects for Nuclear Nonproliferation Efforts

Kerry said in the debate that "It doesn't make sense" for "the United States to pursue a new set of nuclear weapons" including "bunker-busting" ones.

CENTERFORSECURITYPOLICY: Kerry's nuclear nonsense

It took a year to muster an Arab counter-strike, but on October 24th a squadron of Lebanese chefs cooked up a bunker-busting bowlful that weighed in at over 2, 000kg.

ECONOMIST: A good-humoured war over food