SpaceX’s Unlikely Journey From Far-Out Idea to $2 Trillion Juggernaut

Elon Musk said he had initially given SpaceX less than a 10 percent chance of succeeding. His rocket company has come a long way.A SpaceX ad on the Nasdaq MarketSite tower in Times Square. The company, which Elon Musk founded in 2002, began trading on the stock market on Friday.