Designed for the 1976 Olympic Games, Olympic Stadium was not completed on time due to a strike by construction workers. The (556-foot-high) leaning tower used to retract the roof stood half finished until 1987 when the roof was finally completed. It took another 2 years before the roof, made from 60,696 square feet of Kevlar weighing 50 tons, became retractable. Problems with opening and closing the roof led to its permanent closure. In the spring of 1998, the orange Kevlar roof was removed and a $26 million opaque blue roof replaced it later in the year. The new roof does not open. The stadium’s total cost has exceeded $1 billion