In March 2006, it was revealed by the Archivist of the United States in a public hearing that a memorandum of understanding between NARA and various government agencies existed to "reclassify", i.e., withdraw from public access, certain documents in the name of national security, and to do so in a manner such that researchers would not be likely to discover the process (the U.S. reclassification program). An audit indicated that more than one third withdrawn since 1999 did not contain sensitive information. The program was originally scheduled to end in 2007.