Noted Bay Area labor photographer Joe Blum is displaying The Bridge Builders, featuring 80 large images documenting and honoring the workers who have built the new east span of the San Francisco-Oakland Bay Bridge. The show is at San Francisco City Hall, ground floor (1 Dr. Carlton B. Goodlett Place) and is free and open to the public. Artist reception is Thursday July 11 from 5:30 to 7:30 pm.  See more about the exhibition here. [LMC]