Yemen's Frontline City

A weekly programme from the BBC World Service, bringing forensic journalism from all corners of the world by BBC Eye, the World Service's critically acclaimed investigative unit, and featuring expert global correspondents getting to the heart of the biggest international stories.

In this episode: Nawal Al-Maghafi reports from Yemen's front lines, where Houthi forces are posing the most serious threat in years to the city of Taiz, raising fears of a major escalation in a conflict that has endured for more than a decade. We also trace the roots of Yemen's war, exploring how the country's strategic location has drawn it into a struggle involving Saudi Arabia, Iran and the United States.

Plus: BBC Mundo travels to Panama's Coiba Island, a biodiversity hotspot, to explore how a former prison colony helped preserve a rare and fragile natural world.