today we learned one of the pilots realized it. the cockpit voice recorder showed two seconds before the crash, the pilot called out sink rate, warning, the plane was dropping too fast. yes, sir, the pilot responded. and the warning was repeated twice, once in english, and finally in korean. the pilot at the controls was a trainee on the triple 7 but had substantial experience in other aircraft. he told investigators he was not confident in understanding how the plane's auto flight system worked and felt he should study more. he also said it was difficult and quote, stressful to land the plane visually without an instrument approach to guide them. but he felt pressure to do it because other pilots were. >> we do have an issue in aviation that needs to be dealt with with respect to automation.