. >> for those who are joining us, we are lucky enough to speak with astronaut peggy witson. we're awaiting two astronauts to get out of the capsule, get on a boat and go back to houston. a successful two-month mission. they launched at the end of may to go to the international space station. it's the first commercial spacecraft to be able to successfully complete this mission. peggy, we know this mission, the return to earth was a 19-hour mission. can row cake us through the steps of docking from the international space station, orbiting earth and then finally descending and why something like that takes 19 hour pps it depends on orbital mechanics which is not trivial to explain. it lands on earth in just five or and a half hours. if you want to keep your options open about where you want to land, then you need to have a bit more time on orbit so that you can determine. because of the hurricane they wanted to make that decision as late as possible so they kept the guys on orbit a little bit longer so they could make the best decision possible to land in the site where there'

i want to bring in retired astronaut peggy witson to talk about the tests that these astronauts will undergo in the medical tent. >> they will just watch your eyes. your eyes are bouncing around a little bit because they aren't quite used to the whole gravity thing again. you do different nose touching, finger touching little tests. if they are feeling good enough, they will have them do some walking tests as well. they want to make sure everything is normal. >> doug is the first astronaut to disembark. i want to bring in retired astronaut chris hadfield. we have been talking to peggy about some of the basics that astronauts might feel after being in space for two months. it might be different for everybody. what are some of the effects you fee felt when you disembarked? >> it's really proportional to how long you were in space. if you only up for a week or two it's not so bad. you body still hasn't adapted. after you've been up two months like these guys were or as long as peggy has been, your body is very used to being weightless. it doesn't know what to do with gravity. it thinks