The terrorist attack of September 11, 2001, has cost Americans more than can ever be counted. But by late September, some of those costs were already being calculated:

· $4 billion: Estimated benefits the life-insurance industry expects to pay because of the attacks
· $15 billion: Aid package passed by Congress to bail out the airlines
· 79,390: Airline workers who were laid off after the terrorist attacks
· 1,968: Total number of people killed in the world's 10 worst terrorist attacks before September 11
· 6,333: People reported missing in the World Trade Center rubble as of September 22
· 2,593: Estimated number of foreign citizens from 65 countries missing or dead