 They introduced a more aggressive evolution of garage rock which was often fused with sociopolitical and countercultural lyrics of the era, such as in the song "Motor City Is Burning" (a John Lee Hooker cover adapting the story of the Detroit Race Riot of 1943 to the Detroit riot of 1967).MC5 had ties to radical leftist organizations such as "Up Against the Wall Motherfuckers" and John Sinclair's White Panther Party.Another hotbed of the 1960s counterculture was Austin, Texas, with two of the era's legendary music venues-the Vulcan Gas Company and the Armadillo World Headquarters-and musical talent like Janis Joplin, the 13th Floor Elevators, Shiva's Headband, the Conqueroo, and, later, Stevie Ray Vaughan.