 Jean-Yves Legalle, thank you for being with us. You're the president of the Science Nationale d'Etude spatiale in France. Obviously an expert on space. Do you share the Elon Musk dream of getting to Mars? We are on Mars in CNES because we have a number of cooperation with NASA and last night I got a picture from a sunset on Mars live but we didn't send a human to Mars and in fact Elon Musk that I had the pleasure to introduce in Adelaide Australia last month because I was at the International Astronomical Congress and he made came to make a presentation he wants to send a thousand of people to Mars by 2024 but with one-way tickets exactly yes and is that a reasonable vision dream or ambition it strikes me personally as being horrible perhaps for him but not for me because I just take round-trip tickets and so the question is why to go to Mars I think that NASA had the project which is a journey to Mars which is in my opinion much more reasonable the idea is to send by 2034 or 6 astronauts it's a long journey it's nine months to go six months in orbit nine months to come back in a kind of small space station today is a space station which is in orbit is a 400 tons the idea would be to send a station of 70 tons to Mars and with a round-trip ticket because to observe what is going on Mars and to come back much better idea a final question it seems to me that what Elon Musk has done and what Richard Branson maybe is trying to do is to introduce private enterprise the private sector into space operations what is Europe doing in that domain obviously it works and but what is sometimes a little bit disturbing in when he speaks is that he speaks about one third of things which are working pretty well today the Falcon now in a long vehicle is a good long vehicle one third which is let us stay a little bit futuristic and he and Adelaide introduced the BFR for big fucking rocket which is a huge rocket and one third which is in my opinion Utopia but because you have a mix of all these plus a number of sentences images people sometimes have some difficulty to see what is a truth and what is a dream a truly final question if we are able to come back in a hundred years time will we be in a universe in which there are human beings living on other planets on the planet is very difficult because in the solar system you have only Mars and in addition you don't have a atmosphere and living on Mars but living on Mars with a kind of umbilical going to be a fits very very difficult and in my opinion in 100 years from now we will still be on earth and I like it that's a very smart answer thank you very much Jean-Yves Lagarde thank you thanks a lot