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| Russia and US sign plutonium pact | Russia and US sign plutonium pact |
| (3 days later) | |
| Russia and the US have agreed to dispose of tonnes of surplus weapons-grade plutonium under a deal signed at a nuclear summit in Washington. | Russia and the US have agreed to dispose of tonnes of surplus weapons-grade plutonium under a deal signed at a nuclear summit in Washington. |
| The deal calls for each side to dispose of 34 tonnes of the material. | The deal calls for each side to dispose of 34 tonnes of the material. |
| Moscow is to spend $2.5bn (£1.63bn) on the programme with the US contributing $400m to the Russian disposal. | Moscow is to spend $2.5bn (£1.63bn) on the programme with the US contributing $400m to the Russian disposal. |
| Closing the summit, US President Barack Obama said participants had agreed to secure all the world's vulnerable nuclear material within four years. | Closing the summit, US President Barack Obama said participants had agreed to secure all the world's vulnerable nuclear material within four years. |
| Leaders at the 47-nation summit also pledged to take action to prevent terrorist groups obtaining nuclear material, Mr Obama said. | Leaders at the 47-nation summit also pledged to take action to prevent terrorist groups obtaining nuclear material, Mr Obama said. |
| The US president said the four-point plan reached at the summit would make a real contribution to a safer world. | The US president said the four-point plan reached at the summit would make a real contribution to a safer world. |
| The final communique calls on the 47 nations to work together to prevent nuclear material falling into the hands of "non-state actors". | The final communique calls on the 47 nations to work together to prevent nuclear material falling into the hands of "non-state actors". |
| Terrorist networks such as al-Qaeda have tried to acquire the material for a nuclear weapon and, if they ever succeed, they would surely use it Barack Obama | Terrorist networks such as al-Qaeda have tried to acquire the material for a nuclear weapon and, if they ever succeed, they would surely use it Barack Obama |
| Earlier, he said: "Terrorist networks such as al-Qaeda have tried to acquire the material for a nuclear weapon and, if they ever succeed, they would surely use it." | Earlier, he said: "Terrorist networks such as al-Qaeda have tried to acquire the material for a nuclear weapon and, if they ever succeed, they would surely use it." |
| "Were they to do so, it would be a catastrophe for the world, causing extraordinary loss of life and striking a major blow at global peace and stability," he added. | "Were they to do so, it would be a catastrophe for the world, causing extraordinary loss of life and striking a major blow at global peace and stability," he added. |
| The US and Russia said they wanted to make arms reduction irreversible | The US and Russia said they wanted to make arms reduction irreversible |
| The US state department said the agreement signed by Moscow and Washington on Tuesday was a major step forward on disposing of "excess weapon-grade plutonium". | The US state department said the agreement signed by Moscow and Washington on Tuesday was a major step forward on disposing of "excess weapon-grade plutonium". |
| "The signing also signifies our commitment to making arms reductions irreversible and to reducing the danger of this material ever falling into the hands of terrorists," it added. | "The signing also signifies our commitment to making arms reductions irreversible and to reducing the danger of this material ever falling into the hands of terrorists," it added. |
| Russia says at the US nuclear summit it will spend $2.5bn to dispose of some of its weapons-grade plutonium. | Russia says at the US nuclear summit it will spend $2.5bn to dispose of some of its weapons-grade plutonium. |
| Earlier, Mexico pledged to eliminate all its highly-enriched uranium. The country will work with the US, Canada and the International Atomic Energy Agency (IAEA) to convert the uranium at its research reactor into lower-grade fuel. | Earlier, Mexico pledged to eliminate all its highly-enriched uranium. The country will work with the US, Canada and the International Atomic Energy Agency (IAEA) to convert the uranium at its research reactor into lower-grade fuel. |
| Ukraine said on Monday that it would ship its high-enriched uranium to protected storage sites abroad - possibly in Russia or the US. | Ukraine said on Monday that it would ship its high-enriched uranium to protected storage sites abroad - possibly in Russia or the US. |
| Co-ordinated effort | Co-ordinated effort |
| The summit's final statement also said that increased security must "not infringe upon the rights of states to develop and utilise nuclear energy for peaceful purposes and technology". | The summit's final statement also said that increased security must "not infringe upon the rights of states to develop and utilise nuclear energy for peaceful purposes and technology". |
| Mr Obama also announced the next nuclear security summit would be held in South Korea in 2012. | Mr Obama also announced the next nuclear security summit would be held in South Korea in 2012. |
| Iran's President Ahmadinejad has called a rival nuclear summit | Iran's President Ahmadinejad has called a rival nuclear summit |
| "This reflects South Korea's leadership regionally and globally," he said. | "This reflects South Korea's leadership regionally and globally," he said. |
| The two-day summit is the biggest international meeting hosted by the US since 1945. | The two-day summit is the biggest international meeting hosted by the US since 1945. |
| It is taking place without representatives of Iran and North Korea, neither of which were invited by the US because of disputes over their nuclear programmes. | It is taking place without representatives of Iran and North Korea, neither of which were invited by the US because of disputes over their nuclear programmes. |
| Iran has announced that it will hold its own nuclear summit in Tehran this weekend with the foreign ministers of 15 countries. | |
| It is estimated there are about 1,600 tonnes of highly enriched uranium in the world - the type used in nuclear weapons. | It is estimated there are about 1,600 tonnes of highly enriched uranium in the world - the type used in nuclear weapons. |
| Experts agree that virtually all of it is held by the acknowledged nuclear-weapons states, most of it in Russia. | Experts agree that virtually all of it is held by the acknowledged nuclear-weapons states, most of it in Russia. |
| Last week, the US and Russia signed a new Strategic Arms Reduction Treaty, reducing each country's deployed nuclear arsenal to 1,550 weapons. | Last week, the US and Russia signed a new Strategic Arms Reduction Treaty, reducing each country's deployed nuclear arsenal to 1,550 weapons. |
| Mr Obama has also approved a new nuclear policy for the US, saying he plans to cut the nuclear arsenal, refrain from nuclear tests and not use nuclear weapons against countries that do not have them. | Mr Obama has also approved a new nuclear policy for the US, saying he plans to cut the nuclear arsenal, refrain from nuclear tests and not use nuclear weapons against countries that do not have them. |