New Ukrainian ambassador to U.S. presents credentials to Obama

"During an official ceremony, Valeriy Chaly thanked Barack Obama for Ukraine's comprehensive support and wished the American people peace and prosperity. He reaffirmed an invitation to the U.S. president on behalf of Ukrainian President Petro Poroshenko to pay a visit to Ukraine," it said. Obama said the ties between the U.S. and Ukraine are strong now as they have never been before and assured the new ambassador that the U.S. remains committed to supporting the Ukrainian people, it said.