From CNN.

A Russian-American woman, Ksenia Karelina, has been released as part of a prisoner exchange between the US and Russia. Karelina, an amateur ballet dancer, was serving a 12-year prison sentence for treason in Russia. She was swapped for Arthur Petrov, a dual Russian-German citizen who was being held in the US on various criminal offenses including smuggling and wire laundering, according to Russian state news agencies. The exchange took place in Abu Dhabi. CNN’s Nic Robertson has more. #CNN #News