This region is where a third of all UK casualties have occurred in the last few years. The Guardian:
British troops today formally ended their mission in Afghanistan's deadly Sangin area by passing control of the district to US forces.
Responsibility for security was switched from 40 Commando Royal Marines to the US Marine Corps just after 6.30am (BST), the defence secretary, Liam Fox, announced.
"British forces have served in Sangin over the last four years and should be very proud of the achievements they have made in one of the most challenging areas of Afghanistan," he said.
