This image provided by Ford's Theatre shows the interior of the theater in Washington, D.C., where President Abraham Lincoln was shot while attending a play in 1865.

A statue of Lincoln with his horse stands outside President Lincoln's Cottage, a historic site in Washington. Lincoln summered there with his family and often commuted a half-hour on horseback to the White House each day.

In this Jan. 10, 2009, photo, a Secret Service agent stands watch while President-elect Barack Obama and family (not seen) visit the Lincoln Memorial, in Washington.

The top hat President Abraham Lincoln wore the night he was assassinated is currently on display at the Smithsonian's National Museum of American History.