US election 2016: Katty Kay's guide to Super Tuesday

This Tuesday 11 states will weigh in on who should be the Republican and Democratic nominees for the 45th president of the United States.

It's called "Super Tuesday" - but does it deserve this nickname? The BBC's Katty Kay looks at why Tuesday is such a big deal for the future of American politics.

Produced by Mat Morrison and Olivia Lace-Evans.