everything that we knew about that flight, the time at which it took off, the root in which it followed, it was headed to beijing, the altitude, we're at 35,000 feet. nobody is touching the controls because right now we're flying just as they were at that time on automatic pilot. everything set to try to replicate what it might have looked like, what it might have felt like. it can only go so far but, again, a night sky outside. all of this demonstrating to us what happened in the moments before. let me show you a quick thing. this is a transponder. much has been made about it. the transponder is the device that gives out the signal that identifies on radar who you are and where you are. can you turn it off? yes, you can. like this. would you ever turn it off? absolutely not, say the experts, bill, but it can be done. so you learn a lot just by sitting in the cockpit. >> it is. we've been trying to get a perspective of what this may have been like and this has been