The holes between the dots

Some people believe technology will render Braille obsolete, that blind people will choose talking apps and audiobooks over embossed dots. Maybe, but Braille has been written off many times before. Each time, it has come back stronger. We trace Braille from its beginnings, in Napoleon's France, through the "War of the Dots" in the early 20th century to the age of the smart phone, and beyond.