Earnhardt's lap belt is a focus . Simpson has been a safety pioneer, mainstay . Statement from Bill Simpson on Earnhardt's seat belt . Belt theory has some detractors . Five-point restraint holds drivers in place .
Belts can break under stress . .
Courage In The Face Of Grief . Earnhardt Jr. says thanks, defends Marlin . . That Way . Childress cites pledge to keep running . . The Chevrolet Monte Carlo that Kevin Harvick will drive at Rockingham.