Reporter Paul Kenyon returns to west Africa to trace the route taken by thousands of migrants every year in their bid to reach Europe at any price.
In the third in a series of films about the perils of the journey, Panorama gains exclusive access to Libyan desert patrols as they search for men risking death to cross the Sahara on foot. Here, Paul discusses his latest programme.
Panorama: Europe or Die Trying, BBC One, Monday, 14 September at 8.30pm.
Photography by Paul Kenyon and Howard Bradburn. Slideshow production by Caroline Mallan and Ushma Vyas. Publication date 11 September 2009.