https://www.reuters.com/article/us-uber-crash/u-s-safety-board-chair-criticizes-uber-for-2018-fatal-self-driving-crash-idUSKBN1XT2IL >The chairman of the U.S. National Transportation Safety Board (NTSB) on Tuesday criticized Uber Technologies Inc for its "ineffective safety culture" at the time of a March 2018 fatal self-driving car crash in Arizona.