Countdown to Extinction is the fifth studio album by American thrash metal band Megadeth, released on July 14, 1992, through Capitol Records. It was the group's second studio release to feature the "classic" lineup of Dave Mustaine, Marty Friedman, David Ellefson and Nick Menza, with all of them contributing to songwriting on the album. The album features some of the band's best known songs such as "Symphony of Destruction", "Sweating Bullets", and "Skin o' My Teeth", which enjoyed significant chart success and made a great musical impact.