sides. the debris field being so early on the runway, potentially even before the runway. that will be a key question that the investigators are going to ask. why was the airplane on the ground so early? that s much earlier than it should have been. we should note also, this plane we re told, asiana airlines flight 214. it left seoul yesterday about 4:35 in the afternoon. it was scheduled to arrive. scheduled to arrive in san francisco at 11:15 local time. so that would be about 2:15 eastern time. we re told that it crash landed shortly before that scheduled landing. captain cox, when you ve landed at san francisco in the past, how does landing at this particular airport compared to landing at other airports? is it more or less difficult? is it about the same?