"We don't often train to do it in an environment, what we call a dirty environment, where there is a radiological enemy here."

VOA: standard.2010.07.21

But the acquisition of radioactive material for a so-called 'dirty bomb,' which is radioactive material that is dispersed with a conventional explosive device, that is not that challenging.

VOA: standard.2009.05.01

but the fact is they are intelligent, ambitious,motivated and to be just a pawn in the story of a whole bunch of men fighting it out,rolling around and getting down-and-dirty, while there you are just a vision in a tight cat-suit is just a boring thing."

VOA: standard.2010.05.19

An expert on nuclear proliferation at the RAND Corporation in the United States, Brian Jenkins,says because of its proximity to Somalia and its close ties to the West, Kenya is vulnerable to the worst-case scenario, where an al-Qaida terrorist unleashes a "dirty bomb" in Nairobi causing the death of thousands.

VOA: standard.2009.05.01