So Maj. Nidal M. Hasan, M.D., who killed 13 human beings at Ft. Hood, carried on e-mail correspondence with radical jihadists, posted praise of suicide bombers and other radical Islamist sentiments on websites, gave lectures at Walter Reed on how Muslim soldiers should not fight fellow-Muslims, and in other ways was open about his radical jihadist beliefs. Not only that, officials knew he had done all these things! But they did nothing about it! Why not?