Is a Britain with nuclear missile-equipped submarines a safer place to live, now and into the future? That is the crux of today's debate on replacing Trident - the weapon system that will cost an estimated £100bn over the next 30 years.

Britain’s fleet of four Trident submarines could be cut to two vessels under plans to be put to the Liberal Democrat conference this autumn.

The Government has downplayed reports that it is considering controversial plants to annex its Trident nuclear base in Scotland amid a storm of protests from Scottish politicians.

His critics say he lacks the political experience to lead Egypt, so 71-year-old Mohamed ElBaradei will need to draw on a past of international diplomacy, largely made up of advising the UN on nuclear weapons.

Declassified military documents reveal that French tests in the region in the 1960s and 1970s posed far more of a threat to those involved than previously acknowledged

Researchers said the event was the 'most powerful ever recorded' by the system

Judges also lifted 'arbitrary and irrational' sanctions imposed against Iranian Bank Mellat

US President’s address at historic Berlin landmark fails to impress Republicans and some in his audience

Talks aim at cooling relations after leader Kim Jong-un threatened nuclear war earlier this year

The Home Secretary's premature decision is enough to show she has prejudged the issue and her bias would make any subsequent decision open to challenge, says Geoffrey Robertson

Whether Iran’s new leader will herald a new era remains unclear

President Vladimir Putin took a tour of the shiny new studio complex of Russia Today, the English-language television channel funded by the Kremlin, and spent an hour answering questions from a number of its journalists during a round-table interview.

Meeting could cool relations after a tense few months