LIM was a non-violent resistance movement in Latvia, established in 1974 by the brothers Bruveris, but Janis Rozukalns later took over leadership. About 20 people were among members, including such noted dissidents as Janis Vevers, Alfreds Levalds, Gunars Astra and Alfreds Aperats.
LIM's resisted Soviet rule in many ways, for instance, every year on November 18 they raised the national flag. LIM also distributed anti-Soviet materials and articles recounting actual Latvian history. The movement was supported in the West by "Gaismas akcija", established by Peteris Klavins, and Rita and Pavils Bruveri from the radio "Briva Eiropa" ("Radio Free Europe"), helping with the technical base and underground contacts.
LIM established a secret transport channel to the West through Tallinn, which helped to acquire books, printing technique, photo negatives and other materials prohibited by the Kremlin. In exchange, they sent the latest information about arrests, harassment and other human rights violations in Latvia and across the Soviet Union.
Risking imprisonment, LIM organized various campaigns. For example, they put a huge poster saying "Moscow, stop terrorizing the Baltic nations!" besides the "Riga" sign on the highway into the city from Jurmala. But what the brothers Bruveri captured on film in 1974 caused a worldwide sensation in 1975. The footage shows the Krustpils Street political prisoner camp OC 78/7, and one can see a prisoner line accompanied by soldiers and guard dogs, as well as a patrol wagon, where one can see the shaved heads of convicts.