At President Abraham Lincoln's funeral in 1865, the oak tree stood just a few feet from the event, shading the funeral choir.
It’s a sign that the car industry is expecting a good year.
Major brands, including Nissan, Toyota, Lexus and Porsche, have spent tens of millions of dollars on new, multi-level display booths at the North American International Auto Show going on in Detroit this week.
Japanese automakers have put the tsunami behind them, and Europeans manufacturers are boasting new fuel-efficient models.
But the hottest launch at the show is the new Chevy Corvette. And with Asian and European economies slowing, the focus is back on the U.S. market.
And while car makers are boasting new gains in battery technology, the excitement is about the improving performance and growing fuel efficiency of gas-powered engines.
Peter O’Dowd follows the route of Abraham Lincoln's funeral train 150 years ago, to look at modern-day race relations and Lincoln's legacy.