Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

One participant in this country's June 1953 rebellion was fictionalized as Harry Melchior in the 2001 film The Tunnel. The movie Night Crossing depicted how two families fled this country via a hot air balloon, and Peter Fechter was left to die in a "death strip" after being shot while trying to escape it. Egon Krenz was the last leader of this country, whose citizens were policed by the (*) Stasi. Due to a massive brain drain, Walter Ulbricht began the construction of a structure in this country that would later be torn down in 1989 with pickaxes and sledgehammers. For ten points, name this Soviet-dominated nation that built the Berlin Wall and joined with West Germany in 1990.
History