MISSLE = I is missing = Iridium is missing , means that the missile was lacking the tracking system therefore the capacity to hit its target
STOPED = P is missing = Plutonium is missing, means that the missile had no nuke, so it was never really dangerous
Q is trying to tell us that the Hawaii alert was a big scare but nobody was ever really in danger?
But why was it so necessary though? Maybe it was a TEST to gauge KIM's true intentions? Idk