During the period between March 2003 and October 2005, at least 5 million e-mails may have been sent but not preserved.

• White House Backups are Incomplete, May Not Contain Some Missing E-mails, National Security Archive, May 6, 2008.

The White House yesterday admitted to a federal magistrate judge that it has no computer back-up tapes with data written before May 23, 2003, and that it cannot track the history of individual hard drives within the White House system that may contain missing e-mails.