There is no need to worry about the U.S. launching nuclear weapons without provocation. Unlike North Korea, whose leader has the only say on every matter in his country, the checks and balances built into the U.S. political system will prevent that country's president from making a unilateral decision to send the missiles flying on a whim. The American safeguards would even have prevented as unstable an individual as Hillary from initiating nuclear warfare if she had been elected President.