Officer Jorge Santander fired the Taser without warning and joked to three fellow policeman about it. The four may be fired, officials say.
The National Transportation Board is amid an investigation after two choppers clipped each other in flight, leaving six injured.
Twilight fans donated blood to Children's Hospital Los Angeles before watching the epic finale. The hospital said the drive helped them reach younger donors.
A union representing Los Angeles International Airport workers said it plans to hold a protest on Thanksgiving eve, one of the busiest travel days of the year.
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