Tam's problem was simple. He lived in a world that belonged to someone else. hey saw Tam's shabby clothing and the small, weather-beaten bag he carried, and they ordered him aside from the flow of passengers, and checked his packet of passports and visas with extreme care. Then they ordered him to wait. Tam waited, a chilly apprehension rising in his throat. For fifteen minutes he watched them, helplessly. Finally, the Spaceport was empty, and the huge liner from the outer Asteroid Rings was b