On this day in #DefLeppardHistory, 40 years ago today (20 May 1980) Def Leppard made their U.S. concert debut with a show in Santa Monica, California which they opened with the song “Hello America”. . . Recalling the gig, Sav said: “We could not believe the reaction. Sure we'd come from England where we were very popular[...]But this was America, where we thought nobody would know anything about us, And these people not only knew the songs, they were going mad for them."