It is unclear when the testimony will start. The judge has to first take attendance, disclose the details of chambers conferences and read waiver rights to the five defendants.
KSM and Walid Bin Attash have military medical appointments (physical therapy) that the prison didn't reschedule.
atwar.blogs.nytimes.com/2014/08/07/dea…
nytimes.com/2020/01/21/us/…
--A long awaited logistics briefing on Pentagon preparations to hold the 9/11 trial a year from now is a classified PowerPoint. So we can't see it.
Today he answered in court: "Probably 2003-2004."
(That's when Gitmo had a black site. The CIA closed it before the Supreme Court ruled in Rasul that Gitmo captives could consult lawyers.)