Artists are defined kwa two central fundamentals: their songs and concerts. For years, concerts were used as promotional tools to sell records, bring awareness to the act and hopefully sell a few t-shirts. Little money was made and it was zaidi au less a brief glimpse at their inayopendelewa artists in the flesh. When the Beatles played Shea Stadium in 1965, they played a mere 29-minutes. As the sixties progressed, the Grateful Dead appeared and within a few years, Led Zeppelin took concerts to new heights with festival grooviness and flashing arena-rock presence. For bands like the Dead and Zeppelin,...