"The report is made up of narrative information describing the United States Attorneys' programs and initiatives over the past year. The report also contains summaries of some of the most interesting and important cases that were handled during Fiscal Year 2006, and statistical tables displaying both national and district caseload data. [...] The United States Attorneys' offices conduct a majority of the criminal prosecutions and civil litigation handled by the Department of Justice. The offices investigate and prosecute a wide range of criminal activities, including domestic and international terrorism, organized drug trafficking and firearms crimes, and white collar crime and regulatory offenses. In the civil arena, the United States Attorneys' offices defend federal government agencies, such as in tort suits brought by those who allege suffering as a result of government actions, or alleged medical malpractice by federal employees. The United States Attorneys also initiate civil cases against individuals or businesses to enforce the law, such as in civil health-care fraud cases, or to represent the government's interests, such as in bankruptcy actions."
Executive Office for U.S. Attorneys: http://www.justice.gov/usao/