At President Abraham Lincoln's funeral in 1865, the oak tree stood just a few feet from the event, shading the funeral choir.
Coffee growers in Central America are facing a crisis because of a fungus that’s affecting the crop. The “roya” leaf rust fungus makes the plants lose their leaves and destroys some of the coffee beans.
In Guatemala, two-thirds of the coffee is affected and hundreds of thousands of jobs are at risk.
The BBC’s Humphrey Hawksley reports.
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.