Nine years after his arrest in Pakistan, self-proclaimed 9/11 mastermind Khaled Sheikh Mohammed could soon be back in court for the much-awaited “trial of the century”. After years of delays, a significant step took place last week when a former aide to Mohammed, Majid Khan, accepted a plea deal with US authorities that will require him to testify against other terror suspects at a tribunal at Guantanamo Bay, Cuba. The five September 11 defendants, known as the “Guantanamo Five” for their incarceration at the US naval base in southern Cuba, will face a trial under special military tribunals created by the George W. Bush administration after the attacks. Procedures for the military tribunals, also known as commissions, were modified by the Obama administration.