News Digest: 'Porsches on Main' | Quarry Lane arts center review | Tri-Valley Mayors' Summit | DUI checkpoint

The PDA's monthly First Weekends on Main program returns from this Friday through Sunday, with one highlight of the August edition being the 'Porsches on Main' event from 11 a.m. to 4 p.m. Saturday. Read that and more in News Digest...

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