"According to media reports, a federal grand jury in Maryland has indicted a 35-year-old man for planting a malicious script, designed to destroy data on the US financial giant's servers.
Rajendrasinh Babubhai Makwana, worked for three years as a software engineer contractor at Fannie Mae's offices in Maryland, where he is said to have had access to all of the company's 4000 servers.
...'Had this malicious script executed, engineers expect it would have caused millions of dollars of damage and reduced if not shutdown operations at Fannie Mae for at least one week," said FBI agent Jessica Nye in a sworn statement. "The total damage would include cleaning out and restoring all 4,000 servers, restoring and securing the automation of mortgages, and restoring all data that was erased.'"
http://www.sophos.com/blogs/gc/g/2009/01/29/fannie-mae-employee-accused-planting-malware-timebomb/