If you were a nationally respected charity in the UK in 1990, you may have had a snowball’s chance to get a top music act such as Robert Plant, Genesis, Eric Clapton, Paul McCartney, or Pink Floyd to play for your benefit, but if you were the Nordoff-Robbins Music Therapy charity in those days, you could get them ALL to play on one humid, rainy day in late June at that year’s annual Knebworth Festival outside London. Here is  Genesis that memorable day performing “Mama” to over 100,000. –Redbeard