National security cases often pose unusual and challenging case-management issues for the courts. Evidence or arguments may be classified; witnesses or the jury may require special security measures; attorneys contacts with their clients may be diminished; other challenges may present themselves. The purpose of this Federal Judicial Center resource is to assemble methods federal judges have employed to meet these challenges so that judges facing the challenges can learn from their colleagues experiences. These case studies include background factual information about a selection of national security cases as well as descriptions of the judges challenges and solutions. The information presented is based on a review of case files and news media accounts and on interviews with the judges.