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Surface, this sky crane fires a number of rocket engines and lowers the thing closer to the surface and then the rover itself pops out, drops its wheels and it hangs there on cables from this rocket. sounds like so much technology and an awful lot of room, scott, for something to go wrong. >> well that's right, jon. you went through the entire scenario as some refer to it, seven minutes of terror. i was actually at nasa headquarters when we reviewed the requirements for the lander because of the terrain it is landing in they couldn't do direct landing with retro rockets straight to the surface...

Have those conditions that are on mars here on earth. so it's going to be an exciting landing. it has a lot of risk. but when when he hope all the subsystem testing and the engineering pays off and we see a successful landing of the rover on mars here next month. jon: i'm hoping it is successful. it would be a great feather if nasa's cap and jpl's cap. tom, i can't believe how complicated this thing looks as it is you know, hurdling toward mars. those seven minutes will be terrifying. >> definitely accepting a gamble this technology will pay off and we'll reap the rewards. we're going to a ver...