East Berlin has two football teams: Eisern Union and BFC Dynamo. With Stasi boss Erich Mielke as its chairman, BFC is very much the team of the state. Eisern Union, on the other hand, is the club for those who oppose the status quo. Unsurprisingly, the Stasi see it as a group of troublemakers. Based in the blue-collar district of Köpenick, Eisern Union is popular with fans over in West Berlin. When the team plays FC Magdeburg, West Berliner Manfred Sangel is in the crowd. He tells us how, after a misunderstanding caused by the blue-and-white Magdeburg strip, a friendship developed between Eastern and Western football fans that proved stronger than the Wall.