Mere hours before US President Donald Trump arrived in South Korea for this week’s Apec summit, Pyongyang launched a salvo of ship-based cruise missiles in an act analysts viewed as a calculated bid to reinforce its nuclear credentials. The missiles, described by North Korean state media as enhanced models optimised for ship-based launches, were fired vertically on Tuesday, reportedly soaring for about 7,800 seconds – more than two hours – before striking their land-based target. Pyongyang...