I think this article shows the importance of having a good strategy for data-loss prevention:

The National Archives and Records Administration last month warned 150,000 more people who interacted with the Clinton administration that their personal information may be at risk after a hard drive was lost.

The December letters were the second batch sent in connection with the March data loss. Previously, NARA mailed more than 26,000 letters to potential identity theft victims, according to the agency's Jan. 4 statement. Data on the drive included the names and Social Security numbers of White House employees, job applicants and White House visitors....