Oprah Winfrey's last show airs today, not just in the US, but in more than 150 other countries. Her global influence is massive. The World's Alex Gallafent reports that there are now scores of copycat shows around the world.
For today's Geo Quiz we are looking for a city located in between the cities of Kampala and Mombasa. Host Katy Clark takes us to the backyard of an ambitious engineer in this city who has built his own aircraft.
Safari tourism in Africa is changing. Tracking down big game is still central, but more and more tourists are also involved with conservation and helping local communities. Correspondent Jake Warga reports.