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NASCAR's two-week stay at its home track wraps up this weekend with races Saturday and Sunday at Lowe's Motor Speedway. To discuss a few of the big stories that have manifested themselves during the first three months of the season, WFAE's Scott Graff called Mike Joy, the lead announcer for NASCAR coverage on Fox and the SpeedChannel. The conversation began with Mike grading the so-called 'Car of Tomorrow,' a new, bigger vehicle NASCAR implemented this year to improve safety and competition.