Senior military leaders took the exceptional step of briefing President Bush this week on a severe and widespread electronic attack on Defense Department computers that may have originated in Russia — an incursion that posed …

Two laptop computers and other equipment were taken from a federal center in New Haven that processes applications for a program that provides identification cards to workers with access to seaports, federal officials said Wednesday.
Authorities …

The Justice Department will unveil changes to FBI ground rules today that would put much more power into the hands of line agents pursuing leads on national security, foreign intelligence and even ordinary criminal cases.
The …

Image Does Not Reflect Actual Alert Status
A major terrorist attack on the United States, probably featuring a weapon of mass destruction, is inevitable during the next four to five years, says Marvin J. Cetron, the …

The next U.S. president should put more emphasis on countering biological threats as part of a rethinking of national security strategy, according to early assessments from the leaders of a commission investigating the threat from …