over to commercial companies transportation of astronauts from the ground to the international space station. >> mr. chiao, also nasa has focused on science a lot. how is that going to change? >> there are exciting missions coming up in 2011. probably the biggest most exc e exciting is the mars laboratory. a new rover launched toward the end of the year that will travel to mars. five times heavier than the rovers on mars right now and has equipment on board to test soil and rock sample for signs of microbial life. that's one to watch closely. >> thank you for your time. we're kinds of condensing this show. but i'm looking forward to 2011 and the nasa program. i'm sure you are too. when it comes to cancer, finding it early is crucial. how do we do that? there's something new. a super early detection medicine innovation possible. talk about that right after the break. is it difficult to get to the bathroom on your own?