No such thing.
Semper Fi
So suppose a guy with 2 grams of this powder mixes it with 50 pounds of concrete, throws the mix in the back of a truck, and drives down I-80 from Sacramento to Oakland, turns south on 880 through San Jose, then turns north on 101 to San Francisco.
Nobody notices the dust fluffing out of the back of the truck. They get it on their cars, travel into neighborhoods, businesses, etc. Like that Sevin dust you put under the house and let the ants track it back into the nests...
Seems to me like the concept of a dirty bomb is obsolete.
No such thing.
Semper Fi
Wow! "Loose Lips Sink Ships" on that one! Of course, you would make a great anti-terror guy. To beat them, one needs to be able to think like them as far as strategies are concerned.
How much is two grams? Sounds like too much to carry around.