Thank you - - I have to say it's rather an odd story - I was thinking Australia but as far as I was aware the UN haven't been active there. The Sahara is a very large place but I suddenly remembered a picture we received about 5 years ago.
We have Spanish friends - he worked for Medicin sans Frontiers after leaving the day job as a surgeon and she did voluntary work for refugees. They made a number of trips to the refugee camps in Algeria and Spanish Sahara and the pictures they sent looked very like your oblique tho no picture of the airstrip. Luckily there aren't many around - looks liek a hell of a spot TBH
Great challenge!!!