In 1974, for instance, a show of unofficial art in a field near Moscow was broken up and the artwork destroyed with a water cannon and bulldozers (see Bulldozer Exhibition). Mikhail Gorbachev's policies of glasnost and perestroika facilitated an explosion of interest in alternative art styles in the late 1980s, but socialist realism remained in limited force as the official state art style until as late as 1991. It was not until after the fall of the Soviet Union that artists were finally freed from state censorship.