Event:
Joan Jett and the Blackhearts' "I Love Rock 'n' Roll" goes #1 for 7 wks
More Notable Events on March 20:
1997 Liggett admits cigarettes are addictive
1994 El Salvador's 1st President election following 12-year-old civil war
1991 Michael Jackson signs $65M 6 album deal with Sony records
1979 Columbia flies on Shuttle carrier aircraft to Kennedy Space Center
1969 Beatle John Lennon marries Yoko Ono in Gibraltar
