Is Yemen's security a risk to the UK?

As Yemen's political landscape remains unstable, will the unrest pose a greater threat to the region's and the UK's security?

A number of terrorist plots have originated in Yemen in recent years, and the country is home to an increasingly influential al-Qaeda group.

Foreign Secretary William Hague has warned that the country could pose a more serious threat to security if it descends into chaos.

Gordon Corera reports.