back into the political fray. trace: i have to ask you, robert, if, indeed, these peace talks go well, what does it mean for the taliban to stop fight increasing do we see them lay down their weapons? what is the definition of that? guest: the taliban are thought one group, made out of many different ethnic subsets. but, what you are essentially seeing is they are taking control over the southern part, and, hopefully trying to run the country from kabul. but the north will not let them do that so several have gotten together and created their political party. most of the afghan military elites are from one of two ethnic groups. so that will not happen. trace: nasa is testing a next generation of manned spay rover putting the new space exploration vehicle through a battery of trial runs.