March 15 (UPI) -- NASCAR star Dale Earnhardt Jr.'s stock car has never had this much value.
On Tuesday, Earnhardt drove Facebook founder Mark Zuckerberg around the track at Charlotte Motor Speedway in North Carolina. The young billionaire then drove the car around himself. Zuckerberg is one of the top 10 richest men in the world, with an estimated net worth of more than $58 billion.