3/11/15 3:00 AM
3/12/15 5:00 AM
3/15/15 2:00 AM
An examination of Abraham Lincoln's embrace of the telegraph, which enabled him to both communicate with generals in the field and feel the pulse of the nation faster than before, and the role it played in shaping the 272-word Gettysburg Address.
The hits and the highlights from WGBH