Khalid Sheikh Mohammed, the alleged mastermind behind the September 11th attacks, will be arraigned at the beginning of May at Guantanamo Bay, according to U.S. Pentagon officials. Mohammed, along with four other co-conspirators, will face charges including terrorism, hijacking an aircraft and murder, for their roles in the 9/11 attacks that killed nearly 3,000 people in 2001. 

The U.S. military recently announced that the men will be tried together in a joint trial. If convicted, the five accused men could face the death penalty. President Barack Obama originally proposed for Mohammed and his men to be tried in Manhattan civilian court, but after major public and media outcry, the trials were shifted back to Cuba where the men are currently incarcerated.