21) Johnny Cash was inducted into which music hall of fame in 1980?
22) The song "Ring of Fire" was co-written by June Carter and Merle KilgoreWho originally recorded the song?
23) Johnny Cash was a member of which military branch in the 1950s?
24) How many albums did Johnny Cash release on Columbia Records?
25) In what year did Johnny Cash perform at Folsom Prison?
26) What instrument did Johnny Cash play on his recordings?