An overview of the successful cooperative threat reduction programs to reduce the threat of Russian 'loose nukes', including the successful Megatons-to-Megawatts program.
One-third of the world's 130 civilian nuclear research reactors lack security upgrades needed to prevent theft of materials that terrorists could use to build an atomic bomb, the chief U.S. nuclear proliferation official says.
The Pentagon has conducted hundreds of crisis-simulation war games to understand how an enemy armed with nuclear, chemical or biological weapons and long-range missiles might use them against the United States. Now, top aides to President Bush are using some of the findings to build a case for a $60 billion missile defense system. But the results of the exercises, also raise significant questions about whether missile defense answers the emerging threat.
A live test of a prototype national missile defense system ended in failure Tuesday night as a missile interceptor missed its dummy warhead target high over the Pacific Ocean.