attempting a visual approach because they had to do because the runway's automatic warning service were out of service due to construction work. according to investigative report released prior to today's hearing the pilot of the asiana flight told investigators he was stressed out as he was about to land the big jet for the very first time in san francisco. he and other three pilots at the controls are not testifying at today's hearing. the investigators questioned them in days after the crash. however other asiana officials are answering questions about how the airline trains its pilot. ntsb wants to know what caused the plane to crash into a seawall and they have been spending a lot of time talking about the in-flight systems that should have helped the pilots. they say the asiana pilot entered higher altitude into the autopilot while the plane was descending and that could have triggered the plane to stall. the ntsb said that the pilots likely believed the plane was in