Rapid progress in information and communications technologies is dramatically enhancing the strategic role of information, positioning effective exploitation of these technology advances as a critical success factor in military affairs. These technology advances are drivers and enablers for the "nervous system" of the militaryâ€"its command, control, communications, computers, and intelligence (C4I) systemsâ€"to more effectively use the "muscle" side of the military. Authored by a committee of experts drawn equally from the military and commercial sectors, Realizing the Potential of C4I identifies three major areas as fundamental challenges to the full Department of Defense (DOD) exploitation of C4I technologyâ€"information systems security, interoperability, and various aspects of DOD process and culture. The book details principles by which to assess DOD efforts in these areas over the long term and provides specific, more immediately actionable recommendations. Although DOD is the focus of this book, the principles and issues presented are also relevant to interoperability, architecture, and security challenges faced by government as a whole and by large, complex public and private enterprises across the economy.

Perhaps the best single way to summarize it is to view the book as a bureaucratic or organizational history. What the author does is to take three distinct historical themes-organization, technology, and ideology and examine how each contributed to the development of WWMCCS and its ability (and frequent inability) to satisfy the demands of national leadership. Whereas earlier works were primarily descriptive, cataloguing the command and control assets then in place or under development, The book offers more analysis by focusing on the issue of how and why WWMCCS developed the way it did. While at first glance less provocative, this approach is potentially more useful for defense decision makers dealing with complex human and technological systems in the post-cold-war era. It also makes for a better story and, I trust, a more interesting read. By necessity, this work is selective. The elements of WWMCCS are so numerous, and the parameters of the system potentially so expansive, that a full treatment is impossible within the compass of a single volume. Indeed, a full treatment of even a single WWMCCS asset or subsystem-the Defense Satellite Communications System, Extremely Low Frequency Communications, the National Military Command System, to name but a few-could itself constitute a substantial work. In its broadest conceptualization, WWMCCS is the world, and my approach has been to deal with the head of the octopus rather than its myriad tentacles.

The confluence of the September 11, 2001 terrorist attack and the U.S. Army's historic role to support civil authorities has resulted in substantial new challenges for the Army. To help meet these challenges, the Assistant Secretary of the Army for Research and Technology requested the National Research Council (NRC) carry out a series of studies on how science and technology could assist the Army prepare for its role in homeland security (HLS). The NRC's Board on Army Science and Technology formed the Committee on Army Science and Technology for Homeland Security to accomplish that assignment. The Committee was asked to review relevant literature and activities, determine areas of emphasis for Army S&T in support of counter terrorism and anti-terrorism, and recommend high-payoff technologies to help the Army fulfill its mission. The Department of Defense Counter-Terrorism Technology Task Force identified four operational areas in reviewing technical proposals for HLS operations: indications and warning; denial and survivability; recovery and consequence management; and attribution and retaliation. The study sponsor asked the Committee to use these four areas as the basis for its assessment of the science and technology (S&T) that will be important for the Army's HLS role. Overall, the Committee found that: There is potential for substantial synergy between S&T work carried out by the Army for its HLS responsibilities and the development of the next generation Army, the Objective Force. The Army National Guard (ARNG) is critical to the success of the Army's HLS efforts.