From March 30th:
http://www.sfweekly.com/2009-04-01/musi ... -sweeper/1
SFWeekly.com wrote:...The album came together over the last year, with Morello writing and producing, Riley in charge of the lyrics, and Moore on beat patrol.
Morello had one secret weapon in the sidelines too. Steve Perry — yes, the very Perry from Journey — did some backing vocals on the album.
"I don't know how it happened," Riley says. "It was like all of a sudden, 'We're going to have Steve Perry come in and do this part,' and I was like, 'All right, cool.'" (For his part, Riley calls Perry a "nice dude.")