Metallica are returning to North America this Fall and today announced the support acts for the run. Here is their announcement:
While we are still enjoying our European summer vacation, a quick note here about the Fall shows in North America. Our French friends Gojira will be joining us, along with Lamb of God, for shows September 14 – October 18, while Lars' brethren from Denmark Volbeat will hanging for the shows October 26 – December 12.

One other quick thing – unfortunately Lamb of God cannot continue on with us in December, so we'll have more news about those shows for you later.