Whether a 14- year-old protester or an anti-war artist, anyone deemed critical of Putin's regime can be locked up for years in Russia. Turbin is currently serving a five-year prison sentence, making him one of Russia's youngest political prisoners.

Last Air in Moscow follows Russian journalists who report on the country's abuses. Reviewer Justin Chang calls it one of the most engrossing films he's seen all year.

Russian President Vladimir Putin has acknowledged U.S. proposals to end the war in Ukraine as a starting point for talks

Stop and you are dead, or fight and you have a chance to survive as a country and with your family," documentary filmmaker Mstyslav Chernov tells Trudy Rubin.