Ok maybe i did read it wrong, i'll have to read it again.. but it did say that the Lunar Lander was suppose to carry 4 people down to the surface. If for people are suppose to go down to the surface then at least 4 people will ride up in the CEV, since the CEV will attach to the Lunar equipment on different launches. If the CEV can only carry 3 people then how is that 4th person going to get up there so he/she can land on the moon with the rest. <br /><br />EDIT:: ok i'm sorry i did read it wrong, a 3 person verison would be taken to the ISS, and a larger 4 person would be sent to the moon. And an even bigger version, a 6 person one, would be taken to Mars. <br /><br />"Engineers already are developing a cone-shaped Crew Exploration Vehicle, or CEV. Initial versions of the CEV would launch aboard the modified shuttle booster rocket and carry three-person crews to the space station a couple of times per year. <br /><br />The ships also could be used to transport cargo to the outpost. Larger, future versions of the capsule would take four people to the moon and six-person crews to Mars."<br /><br />I don't understand really why they need 3 different size ships. Cant they just make a 6 person CEV from the begining and save all the money from having to develop the two other ships. <br />