An Algerian man imprisoned at the Guantanamo Bay detention center for nearly 20 years has been released and sent back to his homeland. The Department of Defense announced Saturday that Sufiyan Barhoumi was repatriated with assurances from the Algerian government that he would be treated humanely there and that security measures would be imposed to reduce the risk that he could pose a threat in the future. The Pentagon did not provide details about those security measures, which could include restrictions on travel. Barhoumi was captured in Pakistan and taken to the US base at Guantanamo Bay, C…