At President Abraham Lincoln's funeral in 1865, the oak tree stood just a few feet from the event, shading the funeral choir.
The zoo in Tripoli hopes to reopen after the revolution that overthrew Colonel Moammar Gadhafi. The zoo was damaged in the intense fighting that took place before the capital fell to the rebel forces. The BBC’s Mark Lowen visited the zoo and has this report.
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.