 In 1977 , Led Zeppelin embarked on another major concert tour of North America . The band set another attendance record , with an audience of 76 @,@ 229 at their Silverdome concert on 30 April . It was , according to the Guinness Book of Records , the largest attendance to that date for a single act show . Although the tour was financially profitable , it was beset by off @-@ stage problems . On 19 April , over 70 people were arrested as about 1 @,@ 000 fans tried to gatecrash Cincinnati Riverfront Coliseum for two sold @-@ out concerts , while others tried to gain entry by throwing rocks and bottles through glass doors . On 3 June , a concert at Tampa Stadium was cut short because of a severe thunderstorm , despite tickets indicating " Rain or Shine " . A riot broke out , resulting in arrests and injuries . 
