IOWA CITY — If Ben Koch hadn’t seen “bright pink” out of the corner of his eye. he might not have saved a life.Koch, 22, a University of Iowa student, was driving his UI CAMBUS route along Grand Avenue on Aug. 28, 2020, when he’d stopped at Riverside Drive to turn left.He saw the flash of pink and looked over to see a woman, wearing a pink shirt, sitting on top of the Burlington Street Bridge’s outer railing that overlooks the Iowa River dam.