Washington, March 25, The Pentagon declared cybersecurity and digital networks as central to modern warfare, telling lawmakers that its "digital backbone" is now a "weapon system" critical to how US forces fight, decide, and win future conflicts.At a Senate Armed Services cyber subcommittee hearing, Department of Defence Chief Information Officer Kirsten Davies said the US military is undertaking a sweeping overhaul of its enterprise IT and cybersecurity systems to gain an operational...