[RayChuang88]

Actually, one of biggest concerns about a terrorist improvised nuclear weapon is the fact if the bomb is detonated a ground level it will kick up a lot a highly radioactive debris--e.g., a huge fallout danger. Anybody 15-20 miles downwind from the blast of a 1 kT IND could face radiation sickness and/or substantially shortened lifespan from fallout radiation exposure.

[COEXERJ145]

Correctly done, adding some Cobalt to a nuke will kick up the fallout tremendously.

That said, I still believe the dangers of a terrorist nuke is way over blown, especially by World NUT Daily.