sentences:  The network wanted the show to attract younger viewers and thus started booking younger musical and entertainment acts for interviews followed by performances.These would on occasion cross over into bizarre territory such as a March 1981 appearance by the punk band the Plasmatics during which lead singer Wendy O. Williams sledgehammered a TV in the studio.The explosion disrupted a live broadcast of "NBC Nightly News" with anchorman John Chancellor being produced in a studio two floors above.