This article talks of The terror drill and how "Fake" "Bombs" WILL GO OFF.

WASHINGTON (Oct. 3) - America is preparing for its biggest terrorism exercise ever next week when three fictional "dirty bombs" go off and cripple transportation arteries in two major U.S. cities and Guam, according to a document obtained by The Associated Press.

Yet even as this drill begins, details from the previous national exercise held in 2005 have yet to be publicly released - information that is supposed to help officials prepare for the next real attack.
Local hospitals and law enforcement agencies will be involved in the "attacks" by the dirty bombs, which are conventional explosives that include some radioactive material that would cause contamination over a limited area but not create actual nuclear explosions.