has been recognized and acknowledged as one of the cornerstones of jazz-metal fusion and a major influence on the technical death metal genre, while Forced Entry's debut album Uncertain Future helped pioneer the late 1980s Seattle music scene. From 1987 to 1989, Overkill released Taking Over, Under the Influence, and The Years of Decay, three albums considered their best. Each of the "Big Four" of thrash metal bands released albums in 1988: Slayer released South of Heaven, Megadeth released So Far, So Good... So What!, Anthrax released State of Euphoria while Metallica's ...And Justice for All spawned the band's first video and Top 40 hit, the World War I–themed song "One". Many thrash metal bands benefited from the exposure they received on MTV's Headbangers Ball, radio stations such as KNAC in Long Beach and Z Rock in Dallas, and coverage on numerous publications, including Kerrang! and RIP Magazine. These outlets not only played a major role in the crossover success of thrash metal during the late 1980s, but helped push album sales of the genre's "Big Four" and similar bands, or moved them from playing clubs to arenas and stadiums. One of the most notable events in thrash metal's growing popularity during this period was the summer of 1988 Monsters of Rock tour in North America (co-headlined by Van Halen and Scorpions), at which Metallica was one of the supporting acts and drew the largest audiences of the two-month-long arena and stadium tour. In the following year, Anthrax teamed up with Exodus and Helloween on a US arena tour sponsored by Headbangers Ball. 1990s A number of more typical but technically sophisticated albums were released in 1990, including Megadeth's Rust in Peace, Anthrax's Persistence of Time, Slayer's Seasons in the Abyss, Suicidal Tendencies' Lights...Camera...Revolution!, Testament's Souls of Black, Kreator's Coma of Souls, Destruction's Cracked Brain, Forbidden's Twisted into Form, Exodus' Impact Is Imminent, Sacred Reich's The American Way, Prong's Beg to Differ, Pantera's Cowboys from Hell and Exhorder's Slaughter in the Vatican; the latter three are often credited for being an integral part of the then-developing groove metal genre. All of those albums were commercial high points for the aforementioned artists. During this period, Megadeth and Slayer co-headlined one of the most successful tours in thrash metal history called the Clash of the Titans; the first leg in Europe included support from Testament and Suicidal Tendencies, while the second leg