One of NASCAR’s greatest moments hangs over this season, casting a shadow that clouds the sport and dwells within some drivers. A third of the way through the season, nobody has found a way to make it go away.

When Kasey Kahne eased his Chevrolet into Victory Lane after his first win with Hendrick Motorsports, many noted that this was the fastest Coca-Cola 600 to go the full distance. Read another way, it was a yet another Sprint Cup race with few cautions to bunch the field and build drama.