Al Unser Sr, Spike Gilhausen and the History of the Hoosier Hundred are profiled by IMS Historian Donald Davidson

With less than 72 hours till the 103rd Running of the Indianapolis 500, the Historian of the Indianapolis Motor Speedway Donald Davidson profiles four time Indianapolis 500 champion Al Unser Sr and Spike Gilhausen.  Also he profiles the history of the Hoosier Hundred on the night of its final ever running at the Indiana State Fairgrounds.