As experienced by the United States, competition has played out in three distinct types of threat activity: sabotage (the destruction of capabilities), espionage (the theft of specific capabilities), and defection (the carrying of knowledge out of the country). Today, the changing innovation environment has created new challenges. Significant advances are being made in start-ups as well as larger companies who no longer rely on U.S. government contracts. Not only does this place a key element of national power in the hands of the private sector, but it often leaves Washington at an informational disadvantage in understanding technologies. This book analyzes these concepts from the perspective of the United States' experience in the field of innovation security. Historical and recent examples illustrate the threats to innovation, the various approaches to mitigating them, and how the evolution of the innovative process now requires rethinking how the United States can benefit from and preserve its cutting edge human capital.