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October 22, 2007 
August 23, 2007 
July 9, 2007 
February 17, 2007 
July 11, 2006 
May 21, 2006 
April 20, 2006 
March 6, 2006 
July 31, 2005 
June 13, 2005 
June 7, 2005 
May 5, 2005 
April 7, 2005 
March 2005: second level of the towers 
2004: first level of the front towers 
2003: brick walls 7.4 x 0.45 m 
2002-2003: concrete poles 7.4 x 0.6 x 0.5 m 
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