The Obama administration has transferred 10 Yemeni prisoners from Guantánamo Bay to Oman in what it calls a significant milestone. After the transfer, 93 prisoners remain at Guantánamo. Many have been cleared for release for years, some for over a decade. A review board has approved 34 prisoners for transfer, which the White House says will continue over the course of the year. Also Thursday, Defense Secretary Ashton Carter announced he’s prepared a plan that would move Guantánamo’s remaining prisoners to a secure site in the United States. President Obama is reportedly in the “final stages” of reviewing the plan.