Preparation for Slipknot's fourth album began towards the end of 2007; work began at Sound Farm Studio in Jamaica, Iowa, with producer Dave Fortman in February 2008. The album was finished in June, and the band went on the All Hope Is Gone World Tour on July 9, 2008. Slipknot's fourth album, "All Hope Is Gone", was released on August 20, 2008, debuting at number one on the "Billboard" albums chart. The album produced five singles; "All Hope Is Gone", "Psychosocial", "Dead Memories", "Sulfur" and "Snuff". 2009 marked the 10th anniversary of Slipknot's debut album; to commemorate the event, the band released a special-edition version of "Slipknot" on September 9, 2009. The band toured in support of the album throughout 2008 and continued until October 31, 2009, resulting in Slipknot's third hiatus.