A congressional investigation has exposed gaping holes in security eight years after the September 11 terrorist attacks. In the "most egregious" case, a government report says, an investigator used the Social Security number of a man who died in 1965 to obtain a Social Security card. In another case, he used the Social Security number of a 5-year-old child and obtained a passport, even though his counterfeit documents and application indicated he was 53.