President Trump added his digital signature to a document meant to wind down the four-month war with Iran on his 80th birthday, as he sought to lock in a fragile preliminary peace agreement.
The deal, which emerged after a frantic weekend, entails Iran reopening the Strait of Hormuz and the U.S. lifting its blockade on Iranian ports and shipping.
U.S. officials say the ceasefire will be extended for 60 days, during which time the U.S. and Iran will conduct talks over Tehran's nuclear program.
Neither side has publicized the text of the agreement, though U.S. officials said the administration would do so in the coming days.
Trump's announcement of the deal was met with uncertainty over what exactly he had agreed to, including among some allies on Capitol Hill and Iran hawks worried that the terms could give Tehran economic relief without resolving the nuclear issue.
