https://www.reuters.com/article/us-autos-tesla-probe/u-s-agency-reviews-whether-2000-teslas-should-have-been-recalled-idUSKBN1WJ1SN >U.S. regulators said on Friday they were reviewing whether Tesla Inc should have recalled 2,000 of its electric cars in May instead of issuing a software upgrade to fix a potential defect that could have resulted in battery fires.