[cgbg]

I have a hard time imagining America "terrorized" by hijacked tugboats

How about if the bad guys drove a small truck with a dirty radioactive bomb in back on to a ferry with a destination of Seattle or San Francisco harbor?

Does that help your imagination?

[Wonder Warthog]

"How about if the bad guys drove a small truck with a dirty radioactive bomb in back on to a ferry with a destination of Seattle or San Francisco harbor?"

Bad scenario. Setting off a "dirty radioactive bomb" in a FERRY on the water is a great way to minimize the effects of the radioactivity. To make maximum use of a "dirty" bomb, it needs to be set off on land in a high-people-density area.

Setting it off on the water pretty much guarantees that much of the radioactive material will sink to the bottom of the harbor---water is GREAT radiation shielding material.

[elfman2]

"How about if the bad guys drove a small truck with a dirty radioactive bomb in back on to a ferry with a destination of Seattle or San Francisco harbor? Does that help your imagination?"

Waste of a dirty bomb. Don't talk to me.