A Saudi engineer who was locked up at Guantánamo Bay prison for 21 years without charge has been released and repatriated. Forty-eight-year-old Ghassan al-Sharbi was detained in Pakistan following the 9/11 attacks, where he says he was tortured before being sent to Guantánamo. Thirty-one people remain locked up at the U.S. military prison; 17 have been cleared for transfer if a host country can be identified.