Metallica is an American heavy metal band that formed in 1981 in Los Angeles, California. Founded when drummer Lars Ulrich posted an advertisement in a Los Angeles newspaper, Metallica´s original line-up consisted of Ulrich, rhythm guitarist and vocalist James Hetfield, lead guitarist Dave Mustaine, and bassist Ron McGovney. McGovney and Mustaine were later ejected from the band, in favor of Cliff Burton and Kirk Hammett, respectively. The ejection of Mustaine resulted in a feud between him and Metallica. Mustaine later went on to form the band Megadeth. In September 1986, Metallica´s tour bus skidded out of control while the band was on tour in Sweden, and Burton was crushed under the bus and killed. Jason Newsted replaced him less than two months later. Newsted left the band in 2001 and was replaced by Robert Trujillo in 2003.