An accused 11 September conspirator has told the US military war court at Guantanamo that he should have access to classified evidence against him.
He argued that if he is executed the secrets will be safer than in the hands of the FBI or CIA.
Walid bin Attash, a Yemeni accused of running an al-Qaeda camp where two of the 11 September hijackers trained in Afghanistan, made his second appearance before the war court at the remote US naval base in Guantanamo Bay, Cuba.
He described himself as proud of any role he played in attacks on the US.
A hearing for another of the suspects, Yemeni Ramzi Binalshibh, was postponed until after an assessment of his mental competency.
A prosecutor told the war court Mr Binalshibh refused to attend the hearing, court officials said.
Mr bin Attash and Mr Binalshibh are accused along with alleged 11 September mastermind Khalid Sheikh Mohammed, Ali Abdul Aziz Ali and Mustafa Ahmed al-Hawsawi of conspiring to kill civilians in the 2001 hijacked airliner attacks on the US, which triggered the Bush administration's global war on terrorism.
The five defendants were transferred to Guantanamo in 2006 after years in secret CIA prisons.
The CIA has acknowledged interrogating Mr Mohammed using a simulated drowning technique known as water-boarding which is condemned as torture by rights groups.
