The 2011 leg of the Roger Waters Wall Live tour has been further expanded today, with the addition of a fourth night at the Hallenstadion in Zurich, Switzerland, on June 25th. Tickets for the preceeding three nights (all in June, but the first two near the start of the month) sold very quickly, and with Roger having a few days before heading off to Manchester, England, for the final two shows on the tour, the decision was clearly made to treat the Swiss to a fourth night. Tickets are NOW on sale through official agents Ticketcorner.ch.