Memorial in the Sahara Desert

On 19 September 1989 UTA Flight 772 was blown up over the Sahara Desert, killing all 170 people on board. Guillaume Denoix de Saint-Marc, whose father was killed on the plane, designed and built a memorial to the victims at the crash site in the Niger desert. Made up of dark stones in a circle with one broken mirror for each person killed, it can be seen from high above the Earth.

Mini and Me: Michael 'Mini' Cooper was the subject of an award-winning documentary by the film-maker Franc Roddam. They tell Matthew about their 38 year friendship and Mini's time spent in care and prison.

What is it like to discover your father is a CIA spy? Foreign correspondent Scott Johnson explores his CIA childhood in his memoir The Wolf and the Watchman.

Also on the programme: Agnieszka Fryckowska is Base Commander at the newly rebuilt Halley 6 base station in the Antarctic and has just spent two months in total darkness.

Picture: Memorial in the Sahara Desert