The braintrust at TrackSide Online explains the reason for cutting practice short yesterday. Seems like something other than cars was getting a bit loose on the track.
Then the track went yellow at 5:30 for one of the strangest debris cautions we've ever seen - specifically, some of the bricks in the Yard of Bricks came loose. As cars were running over the problem spot, the loose bricks were sucked up into the skid plate on the bottom of the passing car. It quickly became apparent the issue couldn't be fixed quickly, and practice was called off for the day around 5:45.
Dave "The King" Wilson caught up with IMS Engineering Overlord Kevin Forbes, who explained the cause of the problem with the three foot section of a 2.5-mile speedway.
Practice and qualification efforts today should be unaffected by the repairs made to the bricks overnight, but unfortunately for stock car fans Goodyear tires now have another reason to inadvertently explode.