Former ballerina 'really, really happy' since release from Russian prison

U.S.-Russian dual citizen Ksenia Karelina, a former ballerina, said she’s been “really, really happy” since she was released from Russia in a prisoner exchange in April. “It feels amazing. It feels so great. And I'm just overwhelmed with feeling of happiness and gratitude now,” Karelina said in an exclusive interview on NewsNation’s “Cuomo,” when anchor...