15 summers ago, in July 2011, U2 came to Montreal on their 360 Degrees tour. But unlike their previous show in 1997, this time, they wouldn't be playing at Olympic Stadium. It was deemed unsafe, and there was nowhere else large enough to accommodate the band's massive stage structure, nicknamed "The Claw."  So the band spent their own money to adapt the old Blue Bonnets racetrack into a world-class concert venue. And the resulting shows would become two of the most memorable shows in Montreal concert history. Randy Renaud revisits that magical weekend on the Chronicles of Rock.

Photo: THE CANADIAN PRESS/Paul Chiasson