STS051-08-029 (12-22 Sept 1993) --- Astronauts James H. Newman, left, and Daniel W. Bursch, mission specialists, participate in a Detailed Supplementary Objective (DSO) dealing with the gastro-intestinal function during extended duration flight (DSO 622). The two are on Discovery's middeck. Bursch holds himself in position with his left hand grasping the emergency escape pole.