actually I may be getting the live aid concert mixed up with the one that was in California in the late '80's. What was that one called?
It was either the US Festival or Yes Festival from what I recall. I saw a bootleg DVD in a record store about six months ago with the performance of the band Triumph at that concert. The guitarist or singer (or whatever he was) of that band was playing at a venue across the street from the store in the next week, hence putting the DVD up on the counter.