On April 6th 1974 Deep Purple appeared on stage at the California Jam festival at the Ontario Speedway in California.Taking top billing at the all-day event, and with great weather, Deep Purple and the other bands drew a crowd of around 165,000 people. It became the largest single-day paid attendance in U.S. rock concert history.
musicofourheart.blog 
I’m sorry I wasn’t there.
Leslie
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