mission related on the far side of the moon, which for geometry purposes, if i am the earth, i'm lolooking at this site, i cannot see e this. what theyy have done is they had a mission where it comemes and lands like this, but they havave side lights out there to coordinate this because i cannot see itit. therere is a level of operatioil complexity thahahas never been done before, but second of all, there's a rover driving a around and d it has landed in an interestingg p place, a crater inside a bigger crater, which is actually the biggest crater in the entire solar system, so the opportunities for science abound. brent: if it is as significant as you say, why are the chinese doing it? why have thehe russians and americans not done it 20 years ago? >> as anan american, i have two was a want to answer. one is thinking globally, whyhy not? why should one or r two countris have the province of exploring the moon? two, with the capabilities thatt arise now from effacement -- advancements in spacace technoly , other countries, so thehe complexity f for doing this has been lowered. the cost has