Lucky U2 fans have found what they were looking for. The 10,000 tickets for the Irish rockers' free Nov. 5 show in front of Berlin's landmark Brandenburg Gate were snapped up in just three hours. Hopeful concertgoers went online at Wednesday morning to get tickets for the four-song show, at one point crashing the website operated by German ticket company Eventim. All the tickets were gone by noon. The concert is a tribute to the fall of the Berlin Wall 20 years ago on Nov. 9, 1989.