to properly analyze, share or verify the accuracy of the information. what does this mean to you as a pentagon? john goley is a former official with the national transportation safety board and a former airline mechanic. how are you doing, sir? good morning to you. >> nice to have you back ogood morning. bill: if a controller false falls a slope on the job they report it. >> this program is very successful. we need to understand why they are falling a sleep. there are scheduling issues, all sorts of issues. unless we take a scientific approach to analyze the events we are never going to get to the root cause and be able to fix it. bill: how big of a problem is this. sir. >> i think it's much bigger than people realize, because the human body wants to sleep at night. we've had ions of that cycle. so we're trying to break that cycle and we need to understand how to do that.