On Dec. 7, AC/DC played a live set in front of a small audience ... A pair of cannons, just like the ones on the album cover, would appear at the end of the show and "fire" into the audience.

AC/DC officially cracked open America with the July 1979 release of the Mutt Lange-produced Highway to Hell, which reached No. 17 on the album charts, They were also certified stateside headliners now ...