At least 20 people were stung and many more terrorized near Los Angeles Saturday when a swarm of bees said to number in the thousands attacked people at a family reunion. It happened in the early evening at Cerritos Regional Park, about 20 miles south of Los Angeles. Witnesses tell KCBS-TV that there were thousands of bees chasing hundreds of people and that the insects seemed to be attacking people with long hair. The bees emerged from inside an underground utility box which they apparently called home. Police say the three people taken to the hospital are expected to be okay and that the bees left the park within an hour of the attack.