Video of the sledgehammer throwing incident in Saturday's NASCAR race

   Ty Dillon and Kevin Harvick were involved in a late-race wreck on the track that spilled over onto pit road at Martinsville Speedway on Saturday. And then the pit crews got involved, which included a sledgehammer being thrown at Harvick's truck.

   Darrell Wallace Jr. won the race, becoming the first African-American driver to win a NASCAR national series race since Wendell Scott won in Jacksonville, Fla., in 1963.