After 300 years in the United Kingdom, Scotland votes next month on whether to break the union, which raises many questions. One is particularly meaningful in the town of Helensburgh, in Western Scotland: What will happen to the U.K.'s nuclear weapons?
The Trident submarine program is based in Scotland, at Faslane naval base.
From a hill just outside Helensburgh, you can gaze down on the base: a beehive of boats and cars humming along the inlet called Gare Loch. More than 6,000 people work there, making it Scotland's largest military facility.