I know these countries are small, but what is going on from...

I know these countries are small, but what is going on from Saudi Arabia in relation to Yemen is on the other side of the country. Security is always good. But the rail system is to be built on the eastern side, the confrontation is on the western side. And the house of Saud hase some friends in high places. If this conflict were to spread then I would expect them to intervene. The US for example.
This project has been in the talks before and after Boulder for many years now. I don't think that Yemen is a problem for the mean time.