In the late 1960s, “The Smothers Brothers Comedy Hour” turned primetime TV upside down. But folk singer-turned-comedians Tom and Dick Smothers challenged those in power, from the White House to CBS, until the network canceled their top-rated counterculture hit in 1969. Today the brothers, now in their eighties, are back for a live stage tour. They chat with correspondent Lee Cowan about sibling rivalry, censorship and sharing a bond that has outlived their critics.
