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United States has been fooled before. There's no doubt about United States. Many presidents previously have signed off on pieces of paper only to find that North Korea either didn't promise what Donald Trump thought they had or actually reneged on their promises, we'll each have to ensure that we do the things, we take the actions necessary to follow through on those commitments and when we do we'll have a verified deal and if we can get that far we will have a historic change.