For David and Michael Johnson, being Philadelphia Eagles fans is more than just a good way to spend Sundays in the fall—it’s a way of life. You can literally see their devotion to the team plastered all over the walls of their "fan cave." The two brothers have posters, replica Super Bowl rings, a Lombardi Trophy, andeven tattoos. But beyond the wins and losses, their passion for the team is rooted in something much deeper: family.