The White House has said that the US is "fully capable" of defending itself against a North Korean ballistic missile attack.
Asked whether North Korea's threat was being taken seriously, a White House spokeswoman said that foreign government's must be "taken at their word".
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Interesting weather today - the sunshine as strong as late summer, but the air as cold as midwinter.
The President's daughter was met with audible groans as she talked about how her father has been "supporting families".
Olympic golden couple Laura and Jason Kenny are among a host of Olympians who have been honoured at Buckingham Palace.