Today is a great day to be a New York Giants' fan.
The team will celebrate its Super Bowl XLII championship by parading down the city's Canyon of Heroes this morning.
After all the backslapping, hand-shaking and celebrating, though, the Giants might begin to feel the sting of what often happens to teams that win.
They find it impossible to keep the gang together.
It seems the Giants could be on the verge of losing defensive coordinator Steve Spagnuolo, who will talk to the Washington Redskins about their head coaching job some time in the next few days.
Losing Spagnuolo, whose passion, energy and aggressive style turned a porous defense into a dominant, championship-caliber one, would be a devastating blow to the Giants.
Giants GM Jerry Reese understands what he has in Spagnuolo.
The Giants' defenders, who took so well to his aggressive style and executed his complicated blitz packages to perfection, certainly don't want to go into next season without him.
Unless Reese is creative, though, the Giants may have to do just that.