WASHINGTON — Elon Musk took ‘daredevil’ to a whole new level this weekend. The CEO of SpaceX and Tesla Motors and his actress wife Talulah Riley spent their vacation walking on top of a flying plane. The adventurous activity — wing walking — isn’t a recent phenomenon. According to Mashable, the U.S. military used wing walking as a practice for “in-air refueling.” Riley shared the couple’s thrilling moments on her Instagram:
Talk about an adrenaline rush…
