Trident nuclear weapons system explained
The House of Commons has backed the renewal of the UK's Trident nuclear weapons system by 472 votes to 117.
Defence Secretary Michael Fallon told MPs nuclear threats were growing around the world and Trident "puts doubts in the minds of our adversaries".
Labour was split over the issue with 140 of its 230 MPs going against leader Jeremy Corbyn and backing the motion.
But what exactly is the Trident system?
19 Jul 2016