UPDATE 1-Elon Musk's 2018 tweet on Tesla union campaign illegal, US court rules A U.S. appeals court said on Friday Tesla Inc CEO Elon Musk violated federal labor law by tweeting that employees of the electric vehicle maker would lose stock options if they joined a union. The New Orleans-based 5th U.S. Circuit Court of Appeals upheld finance.yahoo.com 일론 머스크의 2018년 트윗, 스페이스X의 월마트로의 계획 암시 일론 머스크는..