 An American leg began the following year featuring Megadeth, Slayer, and Anthrax, with Alice in Chains as a supporting act.The tour was considered a multi-headliner, as the three main bands alternated time slots.In addition to the Clash of the Titans tour, Megadeth (along with Testament) supported Judas Priest on their "Painkiller" tour in North America late in 1990 and appeared at the second Rock in Rio festival in January 1991.