By Stephen Culp NEW YORK (Reuters) – Wall Street indexes turned sharply lower on Monday, as news that the United States is closing its Kyiv embassy in Ukraine heightened geopolitical tensions and prompted a sell-off in choppy trading. All three major indexes fell after the Wall Street Journal reported on the relocation of U.S. diplomatic operations to western Ukraine, in a possible harbinger of imminent Russian invasion. Ukraine President Volodymyr Zelenskiy urged state officials, politicians and business leaders who have recently left the country to return within 24 hours to show unity. “We h…