<P> The performance by The Who in 1967 was another defining moment in the series; as the group often did during that period, The Who destroyed their instruments at the conclusion of their performance of "My Generation", with the usual addition of mild explosives for light pyrotechnic effect . The piece would end with guitarist Pete Townshend grabbing Tommy's guitar and smashing it . On the Smothers Brothers show that night a small amount of explosive was put into the small cannon that Keith Moon kept in his bass drum . But it didn't go off during the rehearsal . Unbeknownst to Moon, a stage hand had added another explosive before the taping, and later Moon added another charge so that now there were three explosive charges in the cannon instead of one . When Moon detonated it, the explosion was so intense that a piece of cymbal shrapnel cut into Moon's arm; Moon is heard moaning in pain toward the end of the piece . Townshend, who had been in front of Moon's drums at the time, had his hair singed by the blast; he is seen putting out sparks in his hair before finishing the sketch with a visibly shocked Tommy Smothers . The blast allegedly contributed heavily to Townshend's long - term hearing loss . </P> <P> With its focus having evolved toward a more youth - oriented one, the show became both popular and controversial . Three specific targets of satire--racism, the President of the United States, and the Vietnam War--wound up defining the show's content for the remainder of its run, eventually leading to its demise . </P> <P> The brothers soon found themselves in regular conflict with CBS's network censors . At the start of the 1968 / 69 season, the network ordered that the Smothers deliver their shows finished and ready to air ten days before airdate so that the censors could edit the shows as necessary . In the season premiere, CBS deleted the entire segment of Belafonte singing "Lord, Don't Stop the Carnival" against a backdrop of the havoc during the 1968 Democratic National Convention, along with two lines from a satire of their main competitor, Bonanza . As the year progressed, battles over content continued, including a David Steinberg sermon about Moses and the Burning Bush . </P> <P> With some local stations making their own deletions of controversial skits or comments, the continuing problems over the show came to a head after CBS broadcast a rerun on March 9, 1969 . The network explained the decision by stating that because that week's episode did not arrive in time to be previewed, it would not be shown . In that program, Joan Baez paid tribute to her then - husband, David Harris, who was entering jail after refusing military service, while comedian Jackie Mason made a joke about children "playing doctor". When the show finally did air, two months later, the network allowed Baez to state that her husband was in prison, but edited out the reason . </P>

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