Traffic

"The direct costs of the September 11 attacks were massive- nearly three thousand lives and economic losses as high as $300 billion-as were the costs of the wars in Afghanistan and Iraq that the United States launched in response. But consider the collateral costs as well. In just three months following the attacks, there were one thousand extra traffic deaths in the United States".

This quote is very interesting because it is just math and they explain all sorts of things in the book, that you would never think of. This quote just explained why the traffic accidents went up in the United States.