North Korea’s ruling party congress, convened only once every five years, opened in Pyongyang this weekend with supreme leader Kim Jong-un poised to formalise a military doctrine with far-reaching implications for security on the Korean peninsula and beyond. State media described the opening of the ninth congress of the Workers’ Party of Korea as unfolding “with splendour” in “the capital city of the revolution”, with 5,000 delegates and 2,000 observers in attendance. The carefully choreographed...