Kraft could, however, be a tough taskmaster, making it clear that there was no place in the flight operations division for those who failed to live up to his exacting standards. "To err is human", went one of his favorite sayings, "but to do so more than once is contrary to Flight Operations Directorate policy."[1] Subordinates who seriously displeased Kraft could find themselves deprived of the opportunity to make it up to him.