<unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> It was the orchestra's debut performance at the Proms. •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
invaded Czechoslovakia to end Alexander Dubček's Prague Spring. After the performance, which had been preceded by heckling and demonstrations, the orchestra and soloist were cheered by the Proms audience.<unk> After the performance, which had been preceded by heckling and demonstrations, the orchestra and soloist were cheered by the Proms audience. Rostropovich stood and held up the conductor's score of the Dvořák as a gesture of solidarity for the composer's homeland and the city of Prague.<unk> Rostropovich stood and held up the conductor's score of the Dvořák as a gesture of solidarity for the composer's homeland and the city of Prague.