ATLANTA — Dexter Wood said Friday’s state title win for Buford High was the sweetest win of them all, not because of the talent on the field — last year’s state runner-up team had more — but because of its success despite tragedies and challenges this year’s team faced. “All the championships have been sweet,” said Wood, the school’s athletic director and former head football coach. “But I don’t think any have been as sweet as this with all we’ve had to overcome.”