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What the UK's main political parties have pledged on foreign policy in their manifestos.
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To understand how a new world war might play out, it's important to remember just how powerful the US really is.
There’s principles, and then there’s policy.
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The way Corbyn's Labour has handled Trident and defence is perfectly in line with Labour's history since the 1960s.
The Weapons Engineer Officer’s Tactical Trigger, which would be used in the event of a missile launch.
The entire concept of nuclear deterrence depends on the assumption that everything will always work perfectly.
HMS Vengeance, off and away.
Reports of a failed Trident missile launch have all sorts of political and security implications – but they don't necessarily spell catastrophe.
An industry in crisis needs a government that can deliver help where it's needed.
MPs have voted to upgrade Trident, despite the enormous price tag and questions over its utility.
Ben Birchall/PA Wire
Laugh at Jeremy Corbyn all you like, but he's right: nuclear deterrence isn't a zero-sum game.
Look out behind you: Jeremy Corbyn replies to David Cameron’s defence statement.
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Corbyn can't replicate his wider popularity among MPs. Will it cost him?
British chief of defence staff did cross the line when discussing the nuclear option.
Is George Osborne deploying the 'Deep State' to secure a long-term nuclear arsenal for Britain?
Jeremy Corbyn is an advocate of increasing Britain’s intake of Syrian refugees.
With strong views on NATO and the EU, the new leader of the opposition is bound to ruffle feathers abroad.
Britain’s nuclear deterrent is attached to four Vanguard-class submarines.
Splits over Trident can create stalemate between the UK's forces, but the public needs to debate renewing the deterrent before time runs out.
The structures in place to prosecute and protect military whistleblowers are outdated Cold War relics – and we don't even know how they're being used.
Labour’s defence policy might sound good, but it’s mainly empty rhetoric.
Stefan Rousseau/PA Archive
On defence, the Labour manifesto is full of fine words, but lacking in substance.
A big decision looms.
Ministry of Defence
The future of four submarines has become the spat-of-the-day in election 2015.
The Trident-class nuclear submarine Vanguard. The Scottish National Party want the weapons system to be scrapped.
Nicola Sturgeon has set out her Scottish National Party's opposition to renewing Britain's nuclear deterrent. Will it cost that much?
When Raymond Odierno has beef, it’s best to listen.
The head of the US army isn't keen for a key ally to opt out of its commitments.
Until May 8, tis all just posturing.
In the run-up to the Scottish independence referendum, the UK government refused to admit to any contingency plans for relocating Trident, the four Vanguard-class submarines mounted with nuclear warheads…
Since Scots can’t make up their minds on Trident, why all the politicking?
UK Ministry of Defence
Polling is shortly to close in the battle to become the next Scottish Labour leader, the result of which will be announced on December 13. Given the party’s position in the polls, whoever takes on this…