Yosef Mendelevitch issues in 1969. Being repeatably refused the right to immigration, he became one of the leaders of the Dymshits–Kuznetsov hijacking affair, recounted in his 2012 memoir, "Unbroken Spirit". As punishment, he was imprisoned for eleven years. During the imprisonment he was punished for keeping Jewish precepts. In 1981, after a worldwide struggle, he was released and immigrated to Israel. He served in Soviet prisons with famous Jewish dissident Natan Sharansky (amongst others). In Sharansky's memoir "Fear No Evil" he describes innovative ways Mendelevitch used to communicate with Sharansky, such as through both toilet bowls and radiators. Mendelevitch had always exhibited
Natan Sharansky becoming a refusenik, Sharansky became a human rights activist, working as a translator for dissident and nuclear physicist Andrei Sakharov, and spokesman for the Moscow Helsinki Group and a leader for the rights of refuseniks. On 15 March 1977 Sharansky was arrested on multiple charges including high treason and spying for Americans. The accusation stipulated that he passed to the West lists of over 1,300 "refuseniks", many of whom were denied exit visas because of their knowledge of state secrets, which resulted in a publication by Robert C. Toth, "Russ Indirectly Reveal 'State Secrets': Clues in Denials of Jewish Visas".