There is not much margin to get (the satellites) in the exact orbit we want it to be. It's an instantaneous launch window -- either you go or don't go.

The first satellites go into orbit around Mars in 2008, as many as a half dozen of them,

We haven't found an exact solar system analog, which would have a circular orbit and a mass closer to that of Jupiter. But this shows we are getting close.

First we have to get it into orbit, which is not an easy task.

Both the primary and backup were lost simultaneously.

We're not going to do anything that will prevent any additional work in that area. It's possible the tank will be ready to fly as-is, depending on what the program decides.