While once considered unconventional, cyber attacks and biological warfare have become an increasing threat to security and a tactic of rising concern. Spanning the areas of computer science, technology and government, technological warfare elucidates the importance of functioning computer networks, screening technologies and the danger that such an attack could pose.

WASHINGTON (AP) — The FBI searched the residence of the son of a Democratic state lawmaker in Tennessee over the weekend looking for evidence linking the young man to the hacking of Republican vice presidential candidate Sarah Palin's personal e-mail account, two law enforcement officials told The Associated Press on Monday.

David Kernell, 20, has not returned repeated phone calls or e-mails from the AP since last week. His lawyer said Monday the family is going through a difficult period.