Probability of RDD

An RDD may be as simple as a pipe bomb or explosives attached to a shipping container of radiological material.  Because of

 the wide availability of radiological material throughout the world, and the ease of building simple explosives, the probability of use of an RDD is much higher than that of a nuclear weapon.

The picture shows a simulated dirty bomb assembled from a fake pipe bomb and a real radiological shipping container.

(Note: Radioactive Yellow II shipping label on container. The “II” (two) is hard to read in this photo, but you can see the yellow color and the radiation symbol, so you can tell it is either Rad yellow one or rad yellow two label).