Complex sentence: The Indestructible Tour was a concert tour by American heavy metal band Disturbed in support of their fourth studio album, "Indestructible", which was released in June 2008.
Split into simpler sentences: The Indestructible Tour was a concert tour by American heavy metal band Disturbed. The tour was in support of the band's fourth studio album, "Indestructible", which was released in June 2008.