VIDEO: San Francisco's 4/20 celebration gets thumbs up

SAN FRANCISCO (KGO) -- San Francisco's 4/20 celebration got a big thumbs up. The smoke from 15,000 people created a hazy fog and there were no arrests.

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RELATED: Thousands gather for 4/20 at San Francisco's Golden Gate Park
PHOTOS: 15,000 people gather for Golden Gate Park 4/20 celebration

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