In which city was John F. Kennedy assassinated in 1963?

Which president pardoned Richard Nixon? Which four presidents were assassinated in office? Who assassinated Abraham Lincoln? In which theater was Abraham Lincoln shot in 1865? Who was accused of assassinating John F. Kennedy? Which president survived an assassination attempt by John Hinckley Jr. in 1981? Which presidents have been impeached by the House of Representatives? Who was the first president to be impeached?