The Guardian view on ties between North Korea and Russia: bad news, and not only for Ukraine | Editorial

Kim Jong-un is reportedly planning to visit Vladimir Putin to discuss arms sales. The consequences could be widely felt North Korea is adept at grabbing attention through both rhetoric and weaponry. On Friday it announced that it had launched its first "tactical nuclear attack submarine", though the South Korean military said it did not appear to be operational. The most important development of recent days, however, is the report that Kim Jong-un will soon visit Russia, to discuss weapons sales...