North Korea’s test of a submarine-launched ballistic missile announced Saturday was not entirely a surprise. The rogue state makes its own version of the 1960s-era Soviet SS-N-6 and uses it as an upper stage in its multistage rockets. Last year a South Korean official confirmed that the North was modifying subs to carry the missile.
In theory this means Pyongyang could mount a surprise nuclear attack, though the missile would require more testing to reliably deliver a warhead. The North could be lying or released doctored photographs, in this case of dictator Kim Jong Un standing aboard a ship and watching as a missile takes flight from beneath the sea.