The Reality of Dirty Nukes
This was a great article from WorldNetDaily, in effect stating the difficulties of smuggling a nuclear device into the United States:
Complexity within a plan is not an advantage to a terrorist. Just as in mechanical devices, the fewer the parts – the greater the reliability. Simplicity has the unassailable merit of reducing the number of variables that can go wrong. A covert operation such as the detonation of a “dirty bomb” must be kept simple if it is to succeed, for a failure is far too costly in political and psychological terms.
The smuggling of enough long-lived, radioisotope to present a problem is an unnecessary complexity that will probably be eliminated by any group of planners with IQs better than double-digits.