Over the past two years, the Obama administration has been secretly developing a new blueprint for pursuing terrorists, a next-generation targeting list called the disposition matrix." The matrix contains the names of terrorism suspects arrayed against an accounting of the resources being marshaled to track them down, including sealed indictments and clandestine operations. U.S. officials said the database is designed to go beyond existing kill lists, mapping plans for the "disposition" of suspects beyond the reach of American drones. The government expects to continue adding names to kill or capture lists for years. Among senior Obama administration officials, there is a broad consensus that such operations are likely to be extended at least another decade. That timeline suggests that the United States has reached only the midpoint of what was once known as the global war on terrorism. Targeting lists that were regarded as finite emergency measures after the attacks of Sept. 11, 2001, are now fixtures of the national security apparatus. The rosters expand and contract with the pace of drone strikes but never go to zero. Obama has institutionalized the highly classified practice of targeted killing, transforming ad-hoc elements into a counterterrorism infrastructure capable of sustaining a seemingly permanent war. Privately, officials acknowledge that the development of the matrix is part of a series of moves, in Washington and overseas, to embed counterterrorism tools into U.S. policy for the long haul.