information. randy cohen live add cross from the world trade center. i was there that day. i was like, woah this, can t happen again that. was the feeling. reporter: hours went by. passengers said everyone appeared calm but these were anxious moments. we weren t sure fit was someone on the plane or something in the plane. this plane sat for hours. and daniel wishes passenger service was better, four hours on the plane? four hours. no drink? nothing. and there is finally buses took passengers to american airlines terminal. they were sent through security again, baggage, rescreened. passengers were tired but relieved. everybody knew something was wrong. nothing was wrong. we re home, safe. this is unclear why the couple was detained. the fbi says they re not under arrest but being questioned. and that they re pakistanies. at san francisco international airport, vic lee, abc 7 news. thank you very much. a high-speed chase ended on a runway at love field