“Plan X is a foundational cyber warfare program that we are building to allow us to have the visibility and the understanding of cyberspace so that we could start to deal with how cyber warfare is happening today and where it will be in the future,” DARPA director Arati Prabhaker told members of the Senate Appropriations Committee’s Defense Subcommittee May 14. “We think it will be integral to the kinetic warfighting of the future.”