Pentagon rolls out new Joint Warfighting Evaluation requiring senior officers to pass wargames and combat assessments before general officer promotion boards.

"Wait a minute, wait a minute. You ain't heard nothing yet." So went the first line of audible dialogue in a feature film, 1927's The Jazz Singer. It was one of the first times that mass media had conveyed the sight and sound of a scene together, and the audience was enthralled. There have been improvements since: black and white has become colour, frame rates and resolutions have increased and sound quality has improved, but the media we consume still caters overwhelmingly, if not exclusively, to our eyes and ears.