Ford's Theatre

Ford's Theatre is an American historical theater in Washington, D.C., later known for being the location where John Wilkes Booth assassinated then President of the USA Abraham Lincoln.

History
Miss Hoover was reading a biography to her second grade class about the assassination of Abraham Lincoln on the last day of school. She was at the moment where John Wilkes Booth shot the president but didn't get to finish when the president died.

Non-canon
Professor Frink travelled back once time in time and saved Abraham Lincoln life because he was dressed up as him and took his place in the theatre.