On this day in Def Leppard history, August 16 1986, Def Leppard took the stage for the Monsters of Rock Festival at Castle Donington. Rick Allen returned to the stage for the first time since the accident with an unforgettable performance. Warlock kicked off the night followed by Bad News, Motörhead, Def Leppard, Scorpions and Ozzy Osbourne.
