Roger Waters' story behind "The Wall"

(CBS News) Roger Waters is playing, singing and most of all, building "The Wall." At three stories tall and 140-yards across, the world's largest movie screen reflects high-definition images from 42 projectors all synchronized to the music. Waters, the creative force behind the legendary rock band Pink Floyd, will appear - along with his enormous wall and the story behind it- in a 60 Minutes report by Steve Kroft to be broadcast Sunday, May 20 at 7 p.m. ET/PT.

It took three years for Waters and his tech team to design the animation on the wall that complements his music at sold-out stadiums all over the world. Waters says of his iconic double album, "I think it strikes some chords that may be just beneath surface in most of us. What it's about, is the walls that exist between human beings, whether... on a family level or on a global level. And I think that resonates with people."

"The Wall" and the work that goes into producing the show is motivation for Waters, continually energizing a 68 year old artist and musician who left the band he founded in 1985. "The emotional payback is enormous. The truth of the matter is that the work is the reward," says Waters. "I mean, the shows are great. Don't get me wrong. I love the shows...But I love...the nature of putting the thing together, you know. I like not just the nuts and bolts, but I like the process of trying to work out how to make it better all the time."

60 Minutes cameras were there for the opening night of nine sold out shows in Buenos Aires - breaking the attendance record previously held by the Rolling Stones. Waters and "The Wall" are now touring in North America through July 2012.