 King (replaced on some dates by Chuck Berry), and Ike and Tina Turner were the supporting acts; audiences were typically in their seats for three hours, including long delays between acts, before the Rolling Stones materialised on stage.Janis Joplin joined the Turners at one of the Madison Square Garden shows.The US was in political turmoil at the time, and some militant groups tried to portray the tour as a call for radical political action, especially in light of the Rolling Stones' 1968 track "Street Fighting Man".