In 1865, the Civil War came to a close. But just six days after the confederate commanding general Robert E. Lee surrendered, President Abraham Lincoln was shot and killed by John Wilkes Booth at the Ford Theatre in Washington DC.  It’s a story that most Americans know, but  Bill O’Reilly has some new perspective on these historic events. O’Reilly, the host of Fox News’s “The O’Reilly Factor,” is also a former high school history teacher, a hobby historian, and co-author of a new book called “Killing Lincoln: The Shocking Assassination That Changed America Forever.”