A cleaner wipes the glass roof of the shopping mall of the "World Trade Center" in Dresden, Germany on Monday at a height of 27 meters (95 feet). Protected by a special rope system, the cleaners wipe the 2,700-square-meter glass roof twice a year. (AP photo by Matthias Rietschel / May 5, 2008)
Thursday, May 08, 2008
Clean Enough to see Through
A cleaner wipes the glass roof of the shopping mall of the "World Trade Center" in Dresden, Germany on Monday at a height of 27 meters (95 feet). Protected by a special rope system, the cleaners wipe the 2,700-square-meter glass roof twice a year. (AP photo by Matthias Rietschel / May 5, 2008)
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