Metallica hit the studio in New York in 1983 to record their debut album which had the working title Metal Up Your Ass. The band's distributors didn't like the name, so they changed it to Kill 'Em All - a live 1982 demo bearing the Metal Up Your Ass title and artwork did see the light of day (above). Four tracks on Kill Em' All, including The Four Horsemen, featured writing contributions from Mustaine. The record has shifted in excess of 3million copies in America alone.
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