Nuclear weapons, too, can be produced using either uranium enriched to weapons-grade or plutonium.
The Chinese first used the stuff in weapons--including rockets and cannon--about 600 years later.
International powers suspect Iran of seeking to develop nuclear weapons - a charge Iran strongly denies.
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In a few cases we found conventional weapons -- but no weapons of mass destruction.
The West fears that Iran seeks nuclear weapons - a claim denied by Tehran.
They are not military weapons - military automatics are fully automatic and are already illegal.
It would require laboratory equipment and scientific knowledge to make a more potent, weapons-grade version, he said.
Barack Obama's vision of a nuclear-weapons-free world into a policy prescription known as the Nuclear Posture Review.
It is building a facility in South Carolina to transform excess weapons-grade plutonium into fuel for nuclear reactors.
In a major and welcomed development, Russia announced that it will close its last weapons-grade plutonium production reactor.
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She quizzed him on whether an independent Scotland would prevent nuclear weapons-carrying warships doing exercises in Scottish waters.
Companies that have nothing to do with chemical weapons--producers of fertilizers, pharmaceuticals and plastics--will bear a heavy burden.
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Mr Obama has said he will call for a renewed ban on assault weapons - which lapsed in 2004.
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UN's chief weapons-inspector for Iraq, next addresses the Security Council on March 7th.
Can criminals with their international trafficking in drugs and weapons--and the money involved--be defeated if countries refuse to work together?
In July, Issa conceded that investigators lack evidence that Holder knew of the failed weapons-tracking tactics of Fast and Furious.
Unfortunately for Kodak, not even weapons-grade nuclear power could save the company from its own irrelevance in the digital age.
Russia and America finalised a decade-old deal to eliminate 68 tonnes of weapons-grade plutonium, enough for nearly 17, 000 nuclear devices.
The International Atomic Energy Agency (IAEA) has previously said it suspects the Parchin site may be being used for nuclear weapons-related testing.
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An estimated 60% of the world's weapons-bearers are civilians (hunters, for example).
It can carry more weapons - both spearfish torpedoes and Tomahawk land attack cruise missiles - than the earlier Trafalgar Class submarine.
That reactor type is not ideal for producing weapons-grade plutonium, but all reactors produce plutonium that could be used in a nuclear explosion.
Both say Iran must not get nuclear weapons - Bibi said he firmly believed that the president would take action to stop it.
International powers want it to stop enriching uranium to a level of 20%, which can then be more easily enriched to weapons-grade level.
One reason why many people distrust nuclear power is because they believe it is impossible to separate civil reactors from weapons-grade fissile material.
Some have spoken out in support of renewing a ban on assault weapons -- high-capacity weapons that have been used in numerous mass shootings.
An agreement to destroy within 30 days and under international supervision all biological, chemical and nuclear weapons-related facilities and stockpiles and ballistic missile sites.
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Unfortunately, the dissemination of nuclear weapons-relevant technology has been the result of an international agreement meant to prevent it: The Nuclear Non-Proliferation Treaty.
As this happens, the world must also support efforts to secure dangerous weapons -- conventional and otherwise -- and bring fighters under central, civilian control.
For uranium to work in a nuclear reactor it must be enriched to contain 2-3% uranium-235 while weapons-grade uranium must contain 90% or more uranium-235.
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