"The final mark of greatness, I think, is emptiness. That is true of music, painting, of anything. The less you can do it with, the more powerful you are."
A local violinist, Steve Wickham, approached The Edge one morning at a bus stop and asked if U2 had any need for a violin on their next album (the War album). In the studio for only half a day, Wickham's electric violin became the final instrumental contribution to Sunday Bloody Sunday.