Iranian representatives were in NK to watch the launches just last week, and they were in Damascus only recently. China has been dragging its heels on acting against either one and we know for a fact that they've been selling rocket technology to Iran and keeping NK alive. I don't believe in coincidences. Each power sees something it wants, and there is a way for all three to achieve them if they act in concert -- just like Hitler, Mussolini, and Hirohito saw sixty-five years ago.
I don't believe it's a coincidence either. They know if they talk on phone lines, others can hear. Maybe it was face to face planning.