Musk becomes world's first trillionaire as SpaceX shares soar

Elon Musk's SpaceX made its stock market debut on Friday with the largest initial public offering in history. Shares surged by almost 20 percent on the first day, propelling the polarizing entrepreneur to become the world's first trillionaire. Musk, who has long advocated for human colonization of Mars, renewed his commitment to the goal, calling the IPO a stepping stone toward interplanetary civilization.