what can be done?(Blog #5)
The worst potential WMD problem is nuclear terrorism, because it combines the unparalleled destructive power of nuclear weapons with the apocalyptic motivations of terrorists against which deterrence, let alone dissuasion or diplomacy, is likely to be ineffective. Luckily, however, eliminating this danger is a realistic goal. To make a nuclear weapon, terrorists must get fissile materials, either plutonium or enriched uranium. But these materials do not occur in nature, and because they require building and operating uranium enrichment facilities or plutonium production reactors and reprocessing facilities, making them will remain beyond the reach of even large and well-organized terrorist groups for the foreseeable future. Therefore, terrorists must obtain fissile materials from governments, and relatively few governments have made such materials thus far.
There is only one way we can stop this and as stated in the plan of action I made, first, ensure that all governments that have plutonium and highly enriched uranium lock them up securely so they cannot be sold to, seized by, or diverted to terrorists. Second, make sure that no more bomb materials are made. And third, destroy extra stocks of these materials whenever and wherever possible. These are impressive thingsfor U.S. global leadership if we ever want to put an end to these.
Book above written about the prevention of WMD by various authors suck as Bob Graham.