Above, from left: Pamela Yates with Dan Gurney, Evi Gurney and Brock Yates.Motorsports journalist and "The Cannonball Run" screenwriter Brock Yates has died after a long struggle with Alzheimer's disease."Today, after suffering with Alzheimer's for the last 12 years, my father finally succumbed," Brock Yates Jr. wrote on Facebook. "He...