It had just stopped at a port connected to Arctic LNG-2, a US-sanctioned liquefied natural gas facility deep in the Russian Arctic, shipping data shows. From there, led most of the way by an icebreaker, the tanker lumbered through thousands of miles of Arctic waters and the Bering Sea. Its roughly two-week trip ended at the Kamchatka Peninsula in Russia’s Far East, where the tanker slipped into a secluded bay that used to be home to a Soviet military settlement.