Original: He is both the youngest ( 43 years old ) and the oldest ( 74 years old ) person to have held the position , as well as the only person to have held the position for two non-consecutive terms , and the second longest serving , behind Robert McNamara .
Simplified: He is both the youngest ( 43 years old ) and the oldest ( 74 years old ) person to have held the position , as well as the only person to have held the position for two non-consecutive terms .