"The report contains statistical tables displaying both national and district caseload data. These priorities represent just some of the many important areas of criminal prosecution and civil litigation handled by the United States Attorneys. [...] The United States Attorneys' offices investigate and prosecute a wide range of criminal activities. The United States Attorneys are called upon to respond to changing priorities, and to become involved in specific crime reduction programs. The number one priority of the United States Attorneys is the prevention of terrorist acts, and the investigation and prosecution of those involved in terrorist attacks. During Fiscal Year 2011, the United States Attorneys also continued their longstanding commitment to address violent crime, the illegal use of firearms, and the accompanying acts of violence in our communities. Other special emphasis areas included civil rights violations, human trafficking, financial fraud, crimes against children, and victims of hate crimes."
Executive Office for U.S. Attorneys: http://www.justice.gov/usao/