U2 have announced an additional stop on the Innocence and Experience tour: Denver, Colorado. Only one show is slated (so far): June 6, at the Pepsi Center. Tickets go on sale Monday, March 23, for the general public, and Thursday, March 19, for U2.com members who haven't used their presale codes (10 a.m. for Experience group, 3 p.m. for Innocence) and new subscribers.