As the investigation into the anthrax attacks widens to include federal laboratories and contractors, government officials have acknowledged that Army scientists in recent years have made anthrax in a powdered form that could be used as a weapon.

A new report from the Monterey Institute of International Studies asserts that a Soviet field test of weaponized smallpox caused an outbreak in 1971 that killed two children and a young woman before health teams were able to control it.

To secure early warning of a bioterror attack, the U.S. government is building a computerized network that will collect and analyze health data of people in eight major cities, administration officials say.