Llinyn Tom Walsh: barn Roger Penske ar fethdaliad Detroit, M1 Rail, Grand Prix, mwy

Tom Walsh sy'n siarad â Roger Penske, sy'n troi'n 77 y mis nesaf, am ei fusnesau awto, am Detroit -- Maer Duggan, Belle Ynys, M1 Rail yn mynd i Bont-y-pwll - am weithio til mae'n gollwng. Arddull Holi ac Ateb

Tom Walsh talks with Roger Penske, who turns 77 next month, about his auto businesses, about Detroit -- Mayor Duggan, Belle Isle, M1 Rail going to Pontiac - about working til he drops. Q-and-A style