1. Without doubt Live Aid.
    Nobody really understood what had just happened at that show until afterwards.
    People can use the term 'pushing the envelope' too loosely these days,and back then I dont even think U2 knew what they'd just done in front of a worldwide audience.
    Definately their most definitive moment in ensuring that they are still relevent today,24yrs after that event.
    And the bit I like most about it,it wasn't planned,it wasn't staged,it was just a unique thing in history that U2 found themselves front and centre of.
  2. the transition from AIWIY to Streets is the best thing i've ever seen
  3. In terms of "defining" there are many but a few that Casper didn't include are:

    Mr MacPhisto

    The release of The Fly single and video clip in 1991

    The release of the Beautiful Day single and video clip in 2000.

    U2's first Southern Hemisphere tour - Under Australian Skies - in 1984.



  4. Live Aid without a doubt indeed, closely followed by the already mentioned PopMart occasions and Red Rocks.

    Love Rescue Me for the last LoveTown Dublin show, followed by the whole ZOOTV tour is also really defining.