The threat of a dirty bomb attack has been a major concern for US intelligence and law enforcement officials for sometime now and although such an attack has not taken place inside the US, it should in no way imply that terrorists have ceased planning such an event.
The Wall St. Journal backs this up with a report.
Denying terrorists access to radiological materials that can be used in a dirty bomb attack—one that could bring our economy to a standstill and render areas uninhabitable for decades—is a major security challenge.
Should a dirty bomb or multiple dirty bombs be detonated in any American city, port complex, airport or train station, the result could be loss of life and widespread panic.
- Essex home raided over Iran dirty bomb threat (timesonline.co.uk)
- Columbia Scientists Prepare for a Threat: A Dirty Bomb in New York (nytimes.com)