Formidable concrete walls took shape under the toiling hands of workers from communist East Germany at the seven crossing points between East and West Berlin on Dec. 4, 1961. The new walls were some seven-foot high and five-foot thick. Only small passages for traffic were left open by the communists. These were just wide enough to let a truck through. In center of the Bornholmer Bridge (French/Russian sector border) is behind steel tank traps a big sign showing the East German emblem hammer and compass. (AP Photo/E.Worth) PA-9300654
