I just found out the other day that Washington has the worlds largest ferry system.
I've heard that also, but at the Washington State Ferry's homepage they only admit to being the biggest in the USA:
Washington State Ferries operates the largest ferry fleet in the United States. Twenty-eight ferries cross Puget Sound and its inland waterways, carrying over 26 million passengers to 20 different ports of call.
At any rate, it would represent a "spectacular" sort of terror target that Al-Queda loves.....the largest ones carry up to 2500 passengers AND over 200 vehicles on each trip. Sinking or badly damaging even one of them would be an event on the scale of 9/11, and yet our local 'news'papers refuse to take the terror threat seriously.
All these ferrries don’t just go to downtown Seattle. Many people use them to commute to work, some just to leave an island they live on, like Anderson Island. McNeil Island has a prison on it accessible only by boat. Loads of tourists ride them, people who would rather walk on the ferry to go into Seattle rather than drive in for the day use them. The San Juan Islands are a popular area by ferry. It is pretty impressive the system we have here.