A proposal offered in the Senate would make misusing body scanner images a federal crime, punishable by up to a year in prison.

A report by the GAO raised questions about potential security gaps along the 4,000-mile border between the U.S. and Canada, with analysts saying the "risk of terrorist activity is high," though the extent of any such activity is unknown.

Homeland Security Secretary Janet Napolitano warned Mexico's drug cartels that any attempt to bring their violent tactics across the border would produce a powerful reaction.

Secretary of Homeland Security Janet Napolitano joined National Football League (NFL) Vice President of Security Milt Ahlerich and Arlington, Texas Chief of Police Theron Bowman to announce a new partnership to bring the Department of Homeland Security's (DHS) "If You See Something, Say Something" public awareness campaign to Super Bowl XLV - to help ensure the security of fans, players, and employees by identifying and reporting suspicious activity.

By the end of April, terror threats to the U.S. will no longer be described in shades of green, blue, yellow, orange and red, says an AP report.

Secretary of Homeland Security Janet Napolitano today announced a new partnership with the World Customs Organization (WCO) to enlist other nations, international bodies and the private sector in increasing the security of the global supply chain—outlining a series of new initiatives to make the system stronger, smarter and more resilient.

The U.S. Homeland Security Department in 2010 identified a terrorist plan to contaminate salad bars and buffets at restaurants and hotels with lethal materials, CBS News reported.