runway into that grassy area between the runways. it was landing, again, on a flight from seoul. number of passengers on board, unknown. again, that last video we saw pictures, we saw people leaving the aircraft, leaving the wreckage scene and coming down the slides that deployed on at least the first two doors of the front section of the airplane. a look a moment ago from flight aware seems to indicate the airport remains closed in san francisco. we'll cover this story throughout the day and bring updates as warranted. for now, i'm lester holt. nbc news, new york. >> okay, we'll pick things up from there. again, this boeing 777, as you can see there, sitting between the runways at san francisco international airport. captain john cox joins me now via telephone, 25 year veteran of u.s. airways.