"They're locking up musicians again!" That cry of alarm was the name of a benefit concert held in Prague to show support for Pussy Riot, the Russian female punk rockers who are facing prison terms for staging a protest in a Moscow cathedral. The Czech musicians included the Plastic People of the Universe, who have reason to sympathize: the band members' arrest in the 1970s helped spur Czechoslovak dissidents' demands for freedom. Video by Margot Buff and Anton Chiriaev.