A 9/11 Story: 4. A Chance Meeting

Inside Britain's most secure interrogation room, Detective Constable David Campbell of Scotland Yard's anti-terror branch has just seven days to question the hijackers’ neighbour from San Diego. A BBC News Long Form Audio production.

Host: Jane McMullen

Series producer: Neal Razzell

Additional production: Sally Abrahams, Keiligh Baker, Nik Sindle

Editor: Matt Willis

Music: Thomas Ross-Fitzsimons

Sound design: Charlie Brandon-King

Production management: Phoebe Lomas

Radio 4 commissioning executive: Tracy Williams

Radio 4 commissioning editor: Dan Clarke