When is the 9/11 mastermind's trial finally happening?

The trial of alleged 9/11 mastermind Khalid Sheikh Mohammed has finally been given a date: June 2028, following 20 years of pre-trial proceedings at Guantanamo Bay [1]. Military prosecutors recently dropped an appeal over a suppressed 2007 confession specifically to keep that 2028 date intact [3]. Even so, as the 25th anniversary of the attacks nears, victims' families say justice still feels a long way off, since the trial itself has not yet begun [2].