VIDEO : Four 70s Rock Groups and N.W.A. Get Inducted into the Rock Hall of Fame

The Rock and Roll Hall of Fame welcomes L.A. rappers NWA among popular 70s rock performers like Cheap Trick, Chicago, Deep Purple and Steve Miller on Friday.
N.W.A.'s music about life on the streets helped to shape the balance toward West Coast rap groups in the 80s, with songs like " ''Boyz-N-The Hood" and "Straight Outta Compton."