https://www.reuters.com/article/us-tesla-selfdriving/teslas-release-of-new-self-driving-software-closely-watched-by-u-s-regulator-idUSKBN27724V >The U.S. auto safety regulator on Thursday said it was closely watching Tesla Inc's release of a software version intended to allow its cars to drive themselves, saying it would not hesitate to take action to protect the public.