pilot les abend and kay, developed tests for piloted used by the faa and various airlines around the world. how does someone with these intentions make it behind the plane? how are there no red flags that go up, how does it happen? >> i'm confident that with this investigation and all the folks looking things into his background and all these resources, that we will find a cause. i mean, it seems unlikely that we won't find something. in terms of the screening that's done, you indicated previously that when he was selected, when he was being hired, he would have undergone personality testing. and he would be undergoing routine medical exams to look at his fitness and we are working toward getting more psychological questions, more mental status questions into that routine health assessment. >> so pilots who have prior mental health issues or issues that come out during their career, they might be monitored