Super Bowl 47: Brother Against Brother

John and Jim Harbaugh are the head coaches of opposing teams in the big game.
2:17 | 02/01/13

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Transcript for Super Bowl 47: Brother Against Brother
failure at the age of 88. Tonight, families getting ready for the super bowl and one family with a happy dilemma. Harbaughs, john and jim brothers, coaching the opposing teams. Today, they made a little bit of history and abc's josh elliott in new orleans. Josh? Reporter: That's right. Here in new orleans it is the ultimate taste of sibling rivalry, two brothers separated by a mere 15 months, leading their respective teams now into the biggest of games which means tussling over 100 yards of turf and really family bragging rights. They shared the world stage today first time ever rival super bowl coaches held a joint press conference before the game and definitely a first for brothers who seem to have much more in common than not. I concur. I concur. I concur. Reporter: They are just over a year apart in age. John, 50, jim, 49. They shared a room in their to toledo home and how to share life. Philosophical commonalities -- I would be hard-pressed to spr spell fifphilosophical. When it comes to coaching they were forged in same red-hot cauldron of competition, their father a long-time coach and their mother who refused to lose. Nobody if the fire who has more competitive fire than my mother. She competes like a maniac. No one would fight for us more like our mom, she would teach us how to have each other's back. Reporter: The strategies they'll use this weekend they learned long ago from dad. Who says he knows what his heart will be after the game. There is going to be one winner and one that is going to be totally disappointed and my thoughts go to that one that will not experience the thrill of victory. Reporter: No matter intensity of the rivalry, both personal and professional, really no matter what happens on sunday, they do both agree on one thing, diane. One day, they will both be happy to coach with the other.

This transcript has been automatically generated and may not be 100% accurate.

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