The terrorist attacks of September 11, 2001, caused tremendous loss of life, property, and income, and the resulting response from public and private organizations was unprecedented. This monograph examines the benefits received by those who were killed or seriously injured on 9/11 and the benefits provided to individuals and businesses in New York City that suffered losses from the attack on the World Trade Center. The authors examine the performance of the compensation system--insurance, tort, government programs, and charity--in responding to the losses stemming from 9/11.