Facebook campus given all-clear after sarin scare
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Facebook's Silicon Valley campus receives the all-clear after fears that a package at its mail facility contained the nerve agent sarin.
Four of the social media company's buildings were evacuated on Monday and two people were checked for possible exposure to the compound that attacks the nervous system and can be fatal.
But exhaustive testing by fire and hazardous material teams found no toxic material, says Jon Johnston, fire marshal for the city of Menlo Park in California where Facebook is based.
"There is no sarin," he says, referring to the package that had erroneously tested positive on Monday morning.
