after oral argument. Since recording devices are banned inside the courtroom of the Supreme Court Building, the delivery of the decision to the media is done via paper copies and is known as the "Running of the Interns". It is possible that through recusals or vacancies the court divides evenly on a case. If that occurs, then the decision of the court below is affirmed, but does not establish binding precedent. In effect, it results in a return to the status quo ante. For a case to be heard, there must be a quorum of at least six justices. If a quorum is not available to hear a case and a majority of qualified justices believes that the case cannot be heard and determined in the next term, then the judgment of the court below is affirmed as if the court had been evenly divided. For cases brought to the Supreme Court by direct appeal from a United States District Court, the chief justice may order the case remanded to the appropriate U.S. Court of Appeals for a final decision there. This has only occurred once in U.S. history, in the case of United States v. Alcoa (1945). Published opinions The court's opinions are published in three stages. First, a slip opinion is made available on the court's web site and through other outlets. Next, several opinions and lists of the court's orders are bound together in paperback form, called a preliminary print of United States Reports, the official series of books in which the final version of the court's opinions appears. About a year after the preliminary prints are issued, a final bound volume of U.S. Reports is issued by the Reporter of Decisions. The individual volumes of U.S. Reports are numbered so that users may cite this set of reports (or a competing version published by another commercial legal publisher but containing parallel citations) to allow those who read their pleadings and other briefs to find the cases quickly and easily. , there are: Final bound volumes of U.S. Reports: 569 volumes, covering cases through June 13, 2013 (part of the October 2012 term). Slip opinions: 21 volumes (565–585 for 2011–2017 terms, three two-part volumes each), plus part 1 of volume 586 (2018 term). , the U.S. Reports have published a total of 30,161 Supreme Court opinions, covering the decisions handed down from February 1790 to March 2012.