According to NBC, the US has a microwave weapon that could be used to down North Korean missiles while they are still at low altitude. These weapons are Counter-electronis High Power Advanced Missile Project (CHAMPs) that are loaded onto a B-52 in an air-launched cruise missile with a range of 700 miles. Of course no one wants to comment about these missiles, but sources did say they were discussed at a White House meeting in August. Once again US technology becomes a great equalizer in the possible conflict with North Korea. Check out the video about the weapon below.
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Source: [H]ardOCP – US Develops Microwave Weapon That Could Destroy North Korean Missiles