At about the time I'm writing this, the first plane hit the WTC.
On 19th of September, 2001, I wrote an article that appeared on Slashdot that detailed our strategy for the War on Terror. Later, when I started blogging, I re-posted it here.
I see no reason to change or update it significantly.
Meanwhile, a person who is shortly going over to serve in the Sandbox (Iraq and environs) wrote an article listing the number of attacks we've suffered over the years from Terrorists. Please go over to the Mudville Gazette and read 'Why?'.