Warner Bros has revealed details about Ben Affleck’s next feature directing effort. Argo, which has just begun principal photography, sheds light on the real-life covert operation to rescue a group of Americans during the 1979 Iran hostage crisis. Six of the 52 Americans taken hostage during Iran’s revolution managed to flee and find refuge at the home of the Canadian ambassador. The risky mission to rescue them before militants discovered their whereabouts was carried out by CIA exfiltration specialist Tony Mendez, and was not made public for decades. Affleck is portraying Mendez in the thriller, which also stars Alan Arkin, Bryan Cranston and John Goodman. Scribe Chris Terrio, who is on board to pen another Affleck directorial project, the Harlan Coben adaptation Tell No One, wrote the screenplay based on a selection from Mendez’s book The Master of Disguise.