The Communist Party seized power on 25 February 1948. No official opposition parties operated thereafter. Dissidents (notably Charter 77 and Civic Forum) created Music Clubs (on a limited basis as only allowed NGOs) and published home-made periodicals (samizdat). Charter 77 was quashed by the government and its signed members were persecuted until the fall of the regime in Czechoslovakia. Later, with the advent of the Civic Forum, independence could truly be seen on the horizon. Until Independence Day on 17 November 1989, the populace faced persecution by the authorities from the secret police. Thus, the general public did not openly support the dissidents for fear of dismissal from work or school. Writers or filmmakers could have their books or films banned for a "negative attitude towards the socialist regime". They also didn't allow Czechs and Slovaks to travel to other non-communist countries. Following this they banned music from foreign countries. This blacklisting included children of former entrepreneurs or non-Communist politicians, having family members living in the West, having supported Alexander Dubček during the Prague Spring, opposing Soviet military occupation, promoting religion, boycotting (rigged) parliamentary elections or signing Charter 77 or associating with those who did. These rules were easy to enforce, as all schools, media and businesses belonged to the state. They were under direct supervision and often were used as accusatory weapons against rivals.