John Cirincione : The first four tests failed . North Korea 's successful launch of a missile is a major feat . Cirincione says it is not a serious military threat to the U.S. or other nations . He says launch will have disproportionate international economic repercussions . Trump : Do n't underestimate the threat , but do n't try and start an arms race .
John Cirincione : North Korea 's successful launch of a missile is a major feat . Cirincione says it is not a serious military threat to the U.S. or other nations . He says launch will have disproportionate international economic repercussions . Trump : Do n't underestimate the threat , but do n't try and start an arms race .