Tom Morello (Rage Against The Machine) Atlas Underground, which will see him joined by Knife Party, Matt Shultz (Cage The Elephant), Skrillex, Bassnectar, GZA, X Ambassadors, and more. So far, you can check out some fan-filmed footage of Morello performing the new track “Battle Sirens” with Knife Party, at one of their recent shows: Morello…