Today In Music History: May 21st, XXXX

A partial look into my boot vaults; on this day in music history: (1)  Fleetwood Mac played in Nashville , TN (1977), (2) Journey played in Chicago, IL, (1982), (3) Led Zeppelin played at the Houston Summit in Houston, TX (1977), and (4) REO Speedwagon played at the Wildflower Festival in Richardson, TX (2011).  And a lot more great, super sounding shows also took place but they don't pull up without a manual search (at this time).  It was a great day in rock 'n' roll concerts...