NASCAR mourns Kyle Busch at a solemn Coca-Cola 600

By Kyle Feldscher, CNN Concord, North Carolina (CNN) — It’s a solemn day as tens of thousands of NASCAR fans are trekking to Charlotte Motor Speedway to remember Kyle Busch at the first race after since his sudden death. The Coca-Cola 600 outside of the Queen City has been circled on race fans’ calendars for