The U.S. government is researching whether the best defense against a chemical, biological or radiological attack might one day be right in everyone's hands - or on their ears.
President Bush and President Vladimir V. Putin of Russia announced a new global program to track potential nuclear terrorists, detect and lock up bomb-making materials and coordinate their responses if terrorists obtain a weapon, according to administration officials who have negotiated the deal.
Beset by delays, cost overruns and technical problems, the U.S. government's quest to defend the nation against a smuggled nuclear weapon or radiological "dirty" bomb is approaching a crossroads.
Undercover Congressional investigators successfully smuggled into the United States enough radioactive material to make two dirty bombs, even after it set off alarms on radiation detectors installed at border checkpoints, a new report says.
With the fragile ecology of coral reefs around the globe increasingly under pressure, scientists on Australia's Great Barrier Reef are establishing a network of sensors to better understand this beautiful part of the underwater world.
An effort to develop cooperative seismic monitoring of the Indian Ocean to prevent a repeat of last year's Tsunami is being held up by Indian concerns that the data could reveal too much about their nuclear weapons testing program.
The US is set to begin deploying a new generation of radiation detectors intended to be America's "last line of defense" against weapons of mass destruction.
Scientists work to turn mobile phones into a distributed network capable of measuring pollution levels -- and possibly detecting nuclear or biological weapons before they can be launched.
The federal government is stepping up efforts to stop terrorists from smuggling nuclear or radiological material into the USA, even as critics fault it for poor planning and outdated equipment.
Proliferation experts testified that not enough attention is being paid to developing better nuclear detection devices to defend against nuclear terrorism.