Monday's transfer of the Yemeni detainees is the largest to a single country at one time under President Joe Biden. Efforts to resettle the group in Oman began years ago, but the

The secret mission left the smallest number of prisoners at Guantánamo Bay since the day the detention center opened in 2002.

The men released from Guantánamo Bay on Monday were never charged with crimes. Their resettlement leaves 15 at the U.S. military prison complex.