SpaceX is clearly not open to criticism. After receiving a complaint from the National Labor Relations Board (NLRB) for allegedly firing employees who dared to criticize Elon Musk’s behavior, SpaceX decided to double down by suing the labor board behind the complaint.Tesla Investors Not Happy With Mr. Tweet's TweetsOffEnglishBillionaire Musk’s rocket company filed a lawsuit against the NLRB on Thursday, claiming that the structure of the independent federal agency violates the U.S. constitution....