This Day In Rock History: April 23rd 1936 Roy Orbison is born in Vernon, Texas. 1947 Rock bassist Glenn Cornick (of Jethro Tull) is born in Barrow-in-Furness, Lancashire, England. 1960 Def Leppard guitarist Steve Clark is born Stephen Maynard Clark in Sheffield, England. 1976 The Rolling Stones release their...