These will power infra-red systems which can be used by the Americans to track possible warheads.
The Soviet Union deployed 1, 547 ICBMs with a like number of independently targetable warheads.
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Earlier, a spokesman for Mr Blair urged patience until the warheads discovery had been assessed.
Some American experts say India has around 60 nuclear warheads and Pakistan about 40.
The atomic scientists estimate that India has about 30-35 nuclear warheads, which is fewer than Pakistan.
The maximum number of operationally available warheads would remain at 160, Mr Hague told MPs.
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But what was the point of having them anyway without warheads to go on them?
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The collapse of the Soviet Union left 3, 400 nuclear warheads in Ukraine, Kazakhstan and Belarus.
In addition, both countries would agree to cut their nuclear arsenals to fewer than 2, 000 warheads.
The Navy has four submarines based at Faslane which carry Trident missiles armed with nuclear warheads.
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Hundreds if not thousands of these warheads are deployed on our strategic submarines today.
Each U.S. SSBN is capable of carrying 24 Trident missiles with up to eight warheads per missile.
Nikonov said Russia's response might be to put multiple warheads on its newest generation of strategic missiles.
The US has now disclosed that it is holding 5113 nuclear warheads, a secret figure until now.
Most of the warheads are thought to be below 20 kilotons, equivalent to 20, 000 tons of TNT.
His view is that the successful hit rate on incoming warheads could be as low as 5-10%.
Imagine that President Obama has his way and the U.S. nuclear arsenal is reduced to 1, 000 deployed warheads.
Deep cuts in the total number of warheads would reduce how many types of warheads we will have.
The Atomic Weapons Establishment (AWE) in Aldermaston, Berkshire, provides the warheads for Trident, the UK's submarine-launched missile system.
The numbers of Russian strategic warheads don't cause, or even exacerbate, either the warning or the stockpile problems.
Our negotiators propose to differentiate between strategic and theater ballistic missiles by the re-entry velocities of their warheads.
Both America and Russia still have far more nuclear warheads than either wants.
They can be launched and on-target in minimal time and carry multiple warheads.
Start II would have reduced each side's nuclear warheads to about 3, 000 each.
Capping U.S. and Russian arsenals at 500 warheads is unrealistic given today's world.
The Spaniards seized the ship, finding between 12 and 15 Scud missiles and warheads hidden under sacks of cement.
Both sides have short and medium-range ballistic missiles which could deliver nuclear warheads.
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