"The United States gains tremendous economic, social, and military advantages from cyberspace. However, our pursuit of these advantages has created extensive dependencies on highly vulnerable information technologies and industrial control systems. As a result, U.S. national security is at unacceptable and growing risk. Over the past several years, the United States has been subjected to cyber attacks and costly cyber intrusions by various actors, including the four most cyber-capable adversary states identified by the Director of National Intelligence (DNI) in 2016."
Office of the Under Secretary of Defense for Acquisition, Technology and Logistics: http://www.acq.osd.mil/