Arab Barghouti, son of imprisoned Palestinian leader Marwan Barghouti, took to the stage at Berlin's Citadel Music Festival on Sunday to demand his father's release. He appeared alongside British trip-hop band Massive Attack during their performance at the festival. Marwan Barghouti, a prominent Palestinian political figure who has been held in Israeli detention for over two decades, is widely seen as a potential future leader of the Palestinian people, making calls for his release a significant moment on the international stage.