Megadeth performs at the Glen Helen Amphitheater in San Bernardino on Sept. 6, 2006. Derek Tobias/STAFF. I know it’s Labor Day in a couple days and I usually do a column of union songs, but after the last couple weeks I’m so very, very tired. I suspect many of…

I Images courtesy “Murder in the Front Row.”Decades after their release, countless fans still furiously debate whether Ride the Lightning or Master of Puppets is the best Metallica album. But the Bay Area spawned an entire thrash scene in the ’80s, including successful bands like Exodus, Testament, Possessed and…