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.

Two Americans held by the Taliban were exchanged for an Afghan imprisoned in the US on narco-terrorism charges.