Ukrainian leaders: Stay calm, Russian invasion not imminent

A serviceman checks his machine-gun in a shelter on the territory controlled by pro-Russian militants at frontline with Ukrainian government forces in Slavyanoserbsk, Luhansk region, eastern Ukraine, Tuesday. Ukraine’s leaders sought to reassure the nation that a feared invasion from neighboring Russia was not imminent, even as they acknowledged the threat is real and prepared to accept a shipment of American military equipment Tuesday to shore up their defenses. (AP Photo/Alexei Alexandrov)

KYIV, Ukraine — Ukraine’s leaders sought Tuesday to reassure the nation that an invasion from neighboring Russia was not imminent, even as they acknowledged the threat is real and received a shipment of U.S. military equipment to shore up their defenses.