A worker welds a section of the Berlin Wall that is rebuild as a tourist attraction in the centre of the city near Checkpoint Charlie, the former U.S. sector border crossing in Berlin, October 7, 2004. Some 15 years after the Berlin wall fell, 57 percent of respondents said German reunification had been a positive development, compared with 29 percent who said it was negative. REUTERS/Michael Dalder MAD/DL