The five 9/11 suspects, including Khalid Sheikh Mohammed, will be tried in front of a military tribunal in Guantanamo Bay, Cuba, which means that if found guilty, they could face the death penalty, Al Jazeera English reports. Within 30 days, the action is set to begin: suspects will hear the charges against them and enter a plea. The charges include terrorism, hijacking an aircraft, conspiracy, murder in violation of the law of war.

This case has not been without its share of drama. In November 2009, President Obama tried moving from a military tribunal at Guantanamo Bay to a civilian court in New York City. But when New Yorkers and Republicans, including Mayor Michael Bloomberg, raised concerns about security and costs to the city. The uproar in New York about holding a civilian trial forced Obama's hand, and in a decision that flew in the face of his campaign promise to close Guantanamo Bay, Obama agreed to restart military trials at Gitmo. In April 2011, Attorney General Eric Holder referred the case back to the military.

"The Obama administration is making a terrible mistake by prosecuting the most important terrorism trials of our time in a second-tier system of justice," ACLU Executive Director Anthony Romero said in a statement. "Whatever verdict comes out of the Guantanamo military commissions will be tainted by an unfair process and the politics that wrongly pulled these cases from federal courts, which have safely and successfully handled hundreds of terrorism trials."