I don't understand this cost estimate for the VSE. Development of the CEV and the CEV launcher taken together is estimated to cost $10 billion. The HLV will cost another $10 billion to develop (NASA's estimate is $5-10 billion). So development of the EDS, the lunar lander and other equipment plus operating costs are expected to amount to more than $80 billion? <br /><br />Also, I find it curious that Griffin testified before congress (before he became NASA administrator) that a return to the moon using the FLO architecture could be done for about $40 billion total...<br />Am I missing something?