Alleged 9/11 plotters, including Khalid Sheikh Mohammed, appear at Guantanamo pretrial hearing

Five alleged 9/11 plotters, including Khalid Sheikh Mohammed who has been called the mastermind behind the September 11 terrorist attacks, appeared in a military court for a pretrial hearing in Guantanamo Bay, Cuba, on Tuesday. All five are accused of having some involvement with planning and executing the 2001 terror attacks.