MEET TRIGGER ARGEE....Half a block from the shopping center, a row of spacers on planet-leave came rollicking cheerily toward her.... Trigger shifted toward the edge of the sidewalk to let them pass. As the line swayed up on her left, there was a shadowy settling of an aircar at the curb to her right. With loud outcries of glad recognition and whoops of laughter, the line swung in about her, close. Bodies crowded against her, a hand was clapped over her mouth. Other hands held her arms. Her feet came off the ground and she had a momentary awareness of being rushed expertly forward. There was a lurching twist as the aircar shot upward...