Donald Trump clearly followed sound, conventional military advice when he struck a Syrian air base in retaliation for the regime's use of chemical weapons. It can only be hoped he is listening the same advice as he deals with North Korea.
Last Saturday a US naval strike force led by aircraft carrier was directed to the Western Pacific, apparently in response to reports North Korea may be about to conduct another nuclear weapon test, which would be its sixth in recent times.
With the carrier group moving towards its coast this week, the North Korean regime issued defiant proclamations announcing America's "reckless moves for invading have reached a serious phase", and promising, "the toughest counteraction against the provocateurs".
Trump, for his part, tweeted, "North Korea is looking for trouble. If China decides to help, that would be great. If not, we will solve the problem without them." So clearly he is trying to put pressure on China rather than North Korea at this stage.
The Chinese President was visiting Trump at the time he struck Syria and perhaps he thinks China has been moved to do his bidding.