"Stop, hey, what's that sound?" Nuclear power getting put down. Again.

In 1979, musicians such as Bonnie Raitt, Graham Nash, and Jackson Browne were hailed "the energy source everyone had been looking for" to fight against nuclear power. The result of their support was termed a "chain reaction." The group has returned, picking up where it left off nearly 30 years ago.

And what better to bridge the gap into the new millennium than YouTube. (Video after the break)

Tuesday’s "The Situation Room" featured two segments with aging rockers who voiced their opposition to Bush administration policies - the first with Crosby and Nash (but not Stills), and the second with Paul Simon. In the first segment, CNN correspondent Carol Costello interviewed the two hippie icons, who compared the Bush administration to a "junta." In the second, host Wolf Blitzer asked Simon about his opposition to President Bush’s veto of the expanded SCHIP program.

Both the Crosby/Nash segment and the Simon segment aired in the 5 pm Eastern hour of "The Situation Room." While Crosby and Nash used fiery rhetoric against Bush, Simon used subdued language. All three wore coats and business shirts, compared to the "rocker garb" of their youth.

Costello interviewed Crosby and Nash at Washington National Cathedral, where the two were to perform at a "peace concert." In their rant against President Bush, Crosby and Nash completed each other’s thoughts, as if they were telepathically-linked.

Chris Matthews joined anti-war rockers David Crosby and Graham Nash as they pined for the good old days of Vietnam war era campus activism and hoped it would rise up again to oppose the "shameless liars" in the Bush administration. Invited on Monday night's "Hardball" to promote their appearance at a peace concert at the National Cathedral, Crosby and Nash riffed with the "Hardball" host about everything from the trashing of the Dixie Chicks and Bill Maher to how Big Oil has made "obsence" profits off the Iraq war.

Crosby and Nash received such a friendly audience from Matthews that Nash actually sucked up to his host as he credited Matthews, along with Keith Olbermann, Jon Stewart and Stephen Colbert, as the only ones who are really "asking the questions":