Here is an approximate outline:
1. Why unconventional nuclear defensive measures are needed.
2. review of special nuclear material and devices.
3. oveview of current technnology (actively being deployed).
4. Why better technology is needed: Container shipping and the ABC news
   gambit.
5. Overview of three possible "new" technologies:
        (a) gamma ray imaging.
        (b) large area neutron detectors using "antineutrino" detector
            technology.
        (c) radiography with cosmic ray muons.