Michael Byers holds the Canada Research Chair in Global Politics and International Law at the University of British Columbia. He co-directs the Outer Space Institute. Elon Musk was in full “crisis-hero-drama mode,” according to a new biography by Walter Isaacson. It was September, 2022, and six aquatic drones had just set off from Ukraine’s Black Sea coast. Packed with explosives, their intended targets were Russian warships in port at Sevastopol, in occupied Crimea. The drones were fitted with small satellite dishes that enable live video-feeds through SpaceX’s constellation of communications satellites, named Starlink. But Mr. Musk, the company’s CEO, had...