SEOUL, South Korea (AP) — North Korean leader Kim Jong Un on Saturday arrived in Russia's far eastern port of Vladivostok, where he was shown nuclear-capable bombers as he continued a trip that has sparked Western concerns about an arms alliance that could fuel Russian President Vladimir Putin’s war on Ukraine. Kim’s to visit to Russia, highlighted by a summit with Putin on Wednesday, comes amid momentum in military cooperation between the countries in which North Korea could potentially seek Russian technologies to advance Kim’s military nuclear program in exchange for providing Russia with badly needed munitions. Later in Vladivostok,...