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 High treason carried the death penalty. The following year, in 1978, he was sentenced to 13 years of forced labor. Sharansky spent time in the Lefortovo Prison in Moscow, followed by Vladimir and Chistopol prisons, where for part of the time he was placed in solitary confinement. His health deteriorated, to the point of endangering his life. Later he was detained in Perm 35, a post-Stalin-Gulag-type so-called "strict regimen colony" in Perm Oblast. He kept himself sane during solitary confinement by playing chess with himself, in his head. Sharansky appeared in a March 1990 edition of "National Geographic" magazine. The