This week saw a dramatic escalation of tensions on the Korean Peninsula. As North Korea promised to engulf the U.S. territory of Guam in "enveloping fire", President Trump tweeted that the U.S. military is "locked and loaded" should North Korea "act unwisely". The North's missile and nuclear programs have been shrouded in secrecy for years, but recent tests have shed more light on their capabilities. Here is what's currently known. North Korean missiles can reach the continental United States. Any ambiguity about the range of the North's Intercontinental Ballistic Missiles was cleared up in July, with two tests of the nation's new Hwasong-14 ICBM . The missiles flew on a trajectory high into space before returning to Earth. Based on the flight time and altitude, it's clear that this missile could reach points along the U.S. West Coast and possibly even farther into the country. It has a lot of other missiles too. Over the past two years, the North has conducted dozens of missile tests
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