…or domestic right-wing extremists?  Beware the latter:

Trust fund millionaire James G. Cummings, an American Nazi sympathizer from Maine who was slain by his wife Amber in December, allegedly had the radioactive components necessary to construct a "dirty bomb," a newly released threat analysis report states.

The man, allegedly furious over the election of President Obama, purchased depleted uranium over the Internet from an American company.

"According to an FBI field intelligence report from the Washington Regional Threat and Analysis Center posted online by WikiLeaks, an organization that posts leaked documents, an investigation into the case revealed that radioactive materials were removed from Cummings’ home after his shooting death on Dec. 9," reported the Bangor Daily News.

"Amber (Cummings) indicated James was very upset with Barack Obama being elected President," reported the Washington Regional Threat and Analysis Center (PDF link). "She indicated James had been in contact with 'white supremacist group(s).' Amber also indicated James mixed chemicals in the kitchen sink at their residence and had mentioned 'dirty bombs.'"

"Also found was literature on how to build 'dirty bombs' and information about cesium-137, strontium-90 and cobalt-60, radioactive materials," said the Bangor Daily.

Take a moment to digest that.  For the first time since 9/11, we have actual evidence of someone contemplating a "dirty bomb", and gathering the materials to build one.

And it wasn't a Muslim extremist from outside the country who "hates our freedoms".

It was a home-grown right-winger who hates Obama.

Don't think that conservative extremists would ever do something as rash as setting off a "dirty bomb" or any other act of terrorism?  Well, ask the people of Oklahoma City….

And let's not forget Eric Rudolph….