A survey of 2,030 children, 2 to 17 years of age, in the United States indicates that the lifetime exposure to disaster is 13.9 percent and that 4.1 percent of the children had experienced a disaster in the prior year. Children are particularly limited in their cognitive capacities to process the meaning of sudden, unexpected chance happenings such as disaster and other traumatic events that uproot their personal and family lives. In 2010, the National Commission on Children and Disasters recognized the unique vulnerability of children to disaster, noting their cognitive and emotional immaturity and their elevated risk for emotional and behavioral problems, including posttraumatic stress disorder, depression, anxiety, bereavement, academic failure, delinquency, and substance abuse.