The organization of Wacken Open Air (WOA) has presented more bands that confirmed their performances for the festival\'s 20th anniversary edition this year. The following bands enrich the line-up of WOA 2009 (in alphabetical order):Completely sold out, the 20th anniversary of Europe\'s biggest metal festival will take place from July 30 - August 1, 2009 in Wacken, Germany.
