AC/DC frontman Brian Johnson dodged catastrophe when a cannon broke apart during the band's show at Allegiant Stadium in Las Vegas on Saturday, Aug. 1. Crew members had wheeled out cannons for the big finish, a spectacle AC/DC has pulled off since 1981. The legendary rock band is pushing through a North American tour that kicked off July 11 in Charlotte, North Carolina. In a recent interview with USA Today, Johnson and guitarist Angus Young talked about life touring at their age. "One of the biggest things we've noticed is we've done this without any major breakdowns," the lead singer said.