pet peter goles is a former managing director with the ntsb, joining us on the telephone. tell us more about the configuration of this aircraft and how it could actually have prevented a worse situation from happening. >> well, the 777, which was, you know, first put in the air in 1994, is required to have a new generation of 16seats, called 1 gcs, which means that every seat in the aircraft is attached to the frame so it does not come loose in a violent crash. and prior to these seats, investigators found that passengers would be badly injured and killed because the seats were coming loose. so, this was part of an effort in the 1980s and '90s to really strengthen the cabin interior so