In the very last hours of President Joe Biden’s time in office, a prisoner exchange years in the making was finally struck: the Taliban agreed to swap two Americans being held in Afghanistan for one Taliban member serving a life sentence in a US prison.

President Joe Biden spoke Sunday with relatives of three Americans the U.S. government is looking to bring home from Afghanistan, but it was unclear from the call if a deal to bring them back that is now on the table could be completed before the he leaves office next week.