ISIS hammered as US drops biggest non-nuclear weapon ever: 21,000lb bomb is used in anger for the first time to obliterate jihadists' caves in AfghanistanU.S. dropped its largest non-nuclear weapon after targeting ISIS in AfghanistanThe GBU-43 bomb weighs 21,600 pounds, is 30 feet long, contains 11 tons of explosives and carries a mile-wide blast radiusIt can create a blast crater more than 300 meters wide after being dropped from a Hercules MC-130 cargo planeTrump pledged in 2015 that if he became president he would 'bomb the s**t out of ' ISIS On Thursday he called the bombing 'another successful job' and said he had delegated strike authority to his military commandersPentagon denies that it was revenge for the death on Saturday of a Green Beret soldier in the same region of Pakistan

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U.S. May Launch Strike If North Korea Reaches For Nuclear Triggerby WILLIAM M. ARKIN, CYNTHIA MCFADDEN, COURTNEY KUBE and KENZI ABOU-SABE

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The U.S. is prepared to launch a preemptive strike with conventional weapons against North Korea should officials become convinced that North Korea is about to follow through with a nuclear weapons test, multiple senior U.S. intelligence officials told NBC News.

North Korea has warned that a "big event" is near, and U.S. officials say signs point to a nuclear test that could come as early as this weekend.