Monsters of Rock 1991: Moscow’s Cowboys From Hell Kick‑Off In September 1991, just as Pantera was wrapping up recording *Vulgar Display of Power*, they got *the call*: open for AC/DC and Metallica at Moscow’s first-ever western rock festival, Monsters of Rock, held at Tushino Airfield. They hit the stage five weeks into mixing *Vulgar*, but fueled by the fresh energy of *Cowboys from Hell*, they ripped into their title track to an estimated half‑million fans. That opening riff—Dime’s signature t