Death Magnetic is the ninth studio album by American heavy metal band Metallica. It was released on 10 September, 2008 by Warner Bros. Records, and is the band's first studio album to feature current bassist Robert Trujillo, as well as the first to be produced by Rick Rubin.[2] Death Magnetic also marks the first time in the band's history in which all band members contributed to each song on an album and the first to include an instrumental track since ...And Justice For All. It is their first studio album released through Warner Bros., although they still remain with Warner Music Group, which also owns Elektra Records, the band's previous label. The album is the band's fifth release to debut at number one on the Billboard 200 in the United States, making Metallica the first band ever to achieve five number one debuts. Since 12 May, 2008, Death Magnetic has been heavily promoted on its specially dedicated website, entitled Mission: Metallica, which features daily updates of exclusive, behind-the-scenes sneak previews with photos and video clips from the studio. United Abominations is the eleventh studio album by the American heavy metal band Megadeth. Released on May 8, 2007, United Abominations is the first Megadeth release distributed through Roadrunner Records, and was recorded with an all new lineup excluding the band's singer, guitarist, songwriter, and frontman Dave Mustaine. While touring to promote the album, guitarist Glen Drover left the band for personal reasons and was replaced by Chris Broderick. United Abominations was well received by critics and debuted at number eight on the Billboard 200, the highest chart position for the band since 1994's Youthanasia. Greg Prato of Allmusic stated Megadeth "sound reborn" on United Abominations.[1] The lyrics of the album deal with politics and the state the world is in, with Ed Thompson of IGN stated the album is the band's most politically charged. The album was named the number one metal album of 2007 by Guitar World.