September 11, 2001, distinguished Cold War historian John Lewis Gaddis argues, was not the first time a surprise attack shattered American assumptions about nat... » 

September 11, 2001, distinguished Cold War historian John Lewis Gaddis argues, was not the first time a surprise attack shattered American assumptions about national security and reshaped American grand strategy. We've been there before, and have responded each time by dramatically expanding our security responsibilities. «