Denny Hamlin explains his Kyle Busch tribute after winning at Michigan

After Denny Hamlin cruised past the finish line at Michigan International Speedway on Sunday — the next closest car more than 11 seconds behind him — a member of his crew brought a flag to his car.Hamlin then started going down the backstretch in the opposite direction so every fan at the FireKeepers Casino 400 could see the flag as it unfurled. It was a No. 18, designed to merge the two numbers most recently used by the late Kyle Busch.Busch raced in a No. 18 Toyota for the longest