Kammala wannan jumla: Rostropovich ya taka leda a The Proms a daren 21 ga watan Agusta 1968. Ya taka leda tare da kungiyar 'yan wasan kwaikwayo ta Soviet State Symphony Orchestra <unk> shi ne wasan kwaikwayo na farko na ƙungiyar mawaƙa a Proms. Shirin ya nuna waƙar Cello Concerto a cikin B minor na dan wasan Czech Antonín Dvořák kuma ya faru a ranar da yarjejeniyar Warsaw
mamaye Czechoslovakia don kawo karshen Alexander Dubček ta Prague Spring. Bayan wasan kwaikwayon, wanda ya riga ya kasance ta hanyar tsokana da zanga-zanga, masu sauraro sun yi wa ƙungiyar mawaƙa da mawaƙa murna. Rostropovich ya tashi tsaye kuma ya ɗaga darajar darektan Dvořák a matsayin nuna haɗin kai ga mahaifar mawaƙin da kuma birnin Prague.