John McIntyre visits the eastern coast of Africa to get up close with some of the biggest sharks on the planet.
Fast:Track, BBC World's weekly travel programme is broadcast on Sundays 0630GMT and repeated during the week.
The latest edition of BBC Two's Newsnight with its daily analysis of news and current affairs.
The latest edition of Panorama will start after a few moments in the video window.
Watch the latest episode of Click, the BBC's flagship technology programme.