NO BACKPACKS ALLOWED AT 2013 BAY TO BREAKERS IN SF: SAN FRANCISCO (AP) — No backpacks, large bags or containers will be allowed at this year's Bay to Breakers footrace in San Francisco as officials heighten security in the wake of the Boston Marathon bombings. The San Francisco Chronicle reports that the race on May 19 is expected to draw 30,000 runners and walkers. San Francisco Police Chief Greg Suhr says the Boston bombings have raised awareness of potential attacks, and is asking observers and runners to report unattended items like backpacks and packages.