The man who escaped is described as white, and he was wearing a black and white T-shirt and blue jeans.

BBC: Robber in 'serious condition' after Oxford jewellery raid

The court heard one man "escaped" in January 2012 and went to police, who raided several Portsmouth addresses and arrested Mr Siwak and Ms Urbanowicz, of Chichester Road in the city.

BBC: Roza Urbanowicz

Yousef escaped at the time, but agents caught his right-hand man, Abdul Hakim Murad, who told them a chilling tale.

CNN: U.S. warned in 1995 of plot to hijack planes, attack buildings

Yousef escaped at the time, but agents caught his right-hand man, Abdul Hakim Murad, who told them about plots to hijack U.S. jets.

CNN: FBI tracked man in custody 2 weeks before attacks