Five men accused of plotting the 9/11 attacks have refused to answer a military judge’s questions during a court hearing at Guantanamo Bay.
Khalid Sheikh Mohammed and four other defendants remained silent and refused to enter pleas to murder and terrorism charges.
Defence lawyers say the military tribunals are illegitimate because of the restricted access they have to their clients.
A relatives of one of the nearly three thousand people who died described the men’s behaviour as “courtroom jihad”.
Khalid Sheikh Mohammed has claimed responsibility for masterminding the hijackings 11 years ago.
Defence lawyers are expected to argue that confession was obtained through torture.