Here on Earth, nothing much could happen, of course. They wouldn't let the Lhari hurt anyone--then Bart remembered his course in Universal Law. The Lhari spaceport in every system, by treaty, was Lhari territory. Once you walked beneath the lightning-flash sign, the authority of the planet ceased to function; you might as well be on that unbelievably remote world in another galaxy that was the Lhari home planet--that world no human had ever seen. On a Lhari spaceport, or on a Lhari ship, you were under the jurisdiction of Lhari law. Tommy stepped off a moving stair and joined him. "The ship's on time--it reported past Luna City a few minutes ago. I'm thirsty--how about a drink?" There was a refreshment stand on this level; they debated briefly between orange juice and a drink with a Lhari name that meant simply _cold sweet_, and finally decided to try it. The name proved descriptive; it was very cold, very sweet and indescribably delicious. "Does this come from the Lhari world, I wonder?" "I imagine it's synthetic," Bart said. "I suppose it won't _hurt_ us?" Bart laughed. "They wouldn't serve it to us if it would. No, men and Lhari are alike in a lot of ways. They breathe the same air. Eat about the same food." Their bodies were adjusted to about the same gravity. They had the same body chemistry--in fact, you couldn't tell Lhari blood from human, even under a microscope. And in the terrible Orion Spaceport wreck sixty years ago, doctors had found that blood plasma from humans could be used for wounded Lhari, and vice versa, though it wasn't safe to transfuse whole blood. But then, even among humans there were five blood types. And yet, for all their likeness, they were _different_. Bart sipped the cold Lhari drink, seeing himself in the mirror behind the refreshment stand; a tall teen-ager, looking older than his seventeen years. He was lithe and well muscled from five years of sports and acrobatics at the Space Academy, he had curling red hair and gray eyes, and he was almost as tall as a Lhari. _Will Dad know me? I was just a little kid when he left me here, and now I'm grown-up._ Tommy grinned at him in the mirror. "What are you going to do, now we've finished our so-called education?" "What do you think? Go back to Vega with Dad, by Lhari ship, and help him run Vega Interplanet. Why else would I bother with all that astrogation and math?" "You're the lucky one, with your father owning a dozen ships! He must be almost as rich as the Lhari." Bart shook his head. "It's not that easy. Space travel inside a system these days is small stuff; all the real travel and shipping goes to the Lhari ships."