Diller Scofidio Renfro and Hood Design is among four finalists for each of three areas to be redone on the Mall. From the top are the firm's visions for Constitution Gardens near the Lincoln Memorial, Union Square, and the Washington Monument grounds at Sylvan Theater. Donald Stastny (above right) will pick the winners. (Diller Scofidio Renfro and Hood Design via Associated Press)
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