I came here to work 24 7 essay help Deborah Hersman, chairwoman of the National Transportation Safety Board, said it wasn't clear what could have caused the pilot's problem when the plane was 500 feet in the air. Asked specifically whether it could have been a laser pointed from the ground, Hersman said she couldn't say what caused it. 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])