The New Warfighting Domain:

Air Force Secretary Michael Wynne compares Billy Mitchell’s efforts to prove airpower’s potential to the effort facing USAF today to prove that cyberspace is a critically important warfighting domain. He writes in a new letter to airmen, “Our cyber airmen’s work is a prerequisite to all military operations: ensuring freedom of action across the electromagnetic spectrum (EMS), which in turn contributes to freedom from attack and freedom to attack in all other domains—land, sea, air, and space.”