A megayacht linked to a sanctioned Russian oligarch has dropped anchor in Hong Kong, amid efforts by the West to seize the luxury assets of Russian elites in allied ports as the war in Ukraine drags on. The Nord, a nearly 142-meter (466-foot) yacht that is said to be one of the world’s largest, was spotted by CNN on Friday in Hong Kong’s waters, just minutes from the central downtown district. The vessel is estimated to be worth at least $500 million and widely believed to belong to Alexey Mordashov, an industrial billionaire, according to a yacht broker who spoke...