CNN The Lead With Jake Tapper March 17, 2014 20:29:00
>> it's a reflection of his love for flying. >> reporter: but there is also this -- >> the other thing that could be important in the simulator is whether the pilot trained anyone else on the simulator. >> reporter: investigating the pilots requires a deep dive into their health and personal history, bank accounts, recent life insurance purchases, divorces, separations. >> there could be a number of things that cause personal stress and under severe stress, a person can do bad things. >> reporter: indicators of a problem could be carefully hidden. >> is there a drug problem, a mental problem, ...