Only two months from now we'll (hopefully) have a new Mars rover trundling about, and NASA engineers are already "cramming" for the landing. This thing is about as self-contained as it can be, and once the light-enduced delay is included it's 15 minutes before they'll find out what happened. In other words, I'm not all that sure what there is to practice for. Ah, well, I guess they need to keep busy somehow. Here's to a safe landing!