For the past three-quarters of a century, the United States has led the world in technological innovation and development. The nation now risks falling behind its competitors, principally China. The United States needs to advance a national innovation strategy to ensure it remains the predominant power in a range of emerging technologies. Innovation and National Security: Keeping Our Edge outlines a strategy based on four pillars: restoring federal funding for research and development, attracting and educating a science and technology workforce, supporting technology adoption in the defense sector, and bolstering and scaling technology alliances and ecosystems. Failure could lead to a future in which rivals strengthen their militaries and threaten U.S. security interests, and new innovation centers replace the United States as the source of original ideas and inspiration for the world.