Mike McColgan (left) helped spark the torch of Celtic punk as the original Dropkick Murphys singer. Then the Desert Storm veteran left the band to pursue a lifelong dream and become a firefighter. He formed Street Dogs as a part-time project, and by the time his first tour was over, he'd decided to make music his full-time gig again. A bit closer to the Murphys than the band's previous LP, the new Back to the World puts rock first and punk second. Live, the Dogs have been known to cover the Ramones' "Commando" and the Clash's "Career Opportunities." "It's our way of genuflectin' and noddin' and acknowledgin' our influences," says McColgan in a thick Boston brogue. Mass is in session.