Trident

Trident - I just don't get it. I have never supported Trident - I never understood how anyone thought that the UK should have the right to plunge the world into a nuclear war.

Now years after the cold war has ended, the Conservatives are pressing on with plans to replace Trident. Why ?

A Conservative was on the radio explaining that we couldn't foresee the enemies the UK would face in 30-50 years and an independent nuclear capability was needed to act as a deterrent.  Top of the list is to deter terrorists and 'rogue states'. 

I wonder why it is that the USA, which has considerably more nuclear missiles than the UK was still unable to deter the terrorist attacks of 9/11 ?

UK nuclear missiles didn't deter Argentina from invading the Falklands.

Can we destroy a country, a region or perhaps the world because a rogue state uses a nuclear weapon ?
Replacing Trident will be spending money we can't afford on something we don't need.