If there was ever any question about rock 'n' roll being alive and well, the answer has arrived in the form of Monster Energy's Rock of Allegiance Tour. The late summer trek will feature four game-changing rock bands from four different countries, with Volbeat, HIM, All That Remains, and Airbourne on the bill.  "The fans have made our North American visits thus far this year great fun and truly memorable," Volbeat frontman Michael Poulsen said.  "We are looking forward to headlinging Monster Energy's Rock Allegiance festival tour this summer, and sharing the stage with HIM, All That Remains, and Airbourne."