North Korea's deployment of troops to support Russian military aggression against Ukraine would mark its "de facto entry" into the war and may subsequently bring changes to the security environment in Asia, a Japanese diplomat who recently left the post of ambassador to Ukraine said Tuesday.Amid reports that North Korea has already sent a batch of troops to Russia for training, former Ambassador to Ukraine Kuninori Matsuda said during an interview in Tokyo that Pyongyang's participation would mean that the war in Europe has become "completely linked with security in East Asia."Matsuda, whos…READ FULL ARTICLE