The last time Natalia Kravtsova heard the voice of her son was on May 18, 2022, two days after he was captured by Russian troops in Mariupol. She has not heard from him since. Shortly after news broke on Jan. 24 that a Russian Il-76 military transport plane had crashed just north of Belgorod in Russia, the Russian authorities alleged that 65 Ukrainian prisoners of war had been on board and that they had all been killed. While Ukraine did not confirm that prisoners are onboard, it later emerged from Ukraine’s Main Intelligence Directorate, known by its Ukrainian acronym HUR, that an exchange of…