According to Vulture, the heralded documentarian has been sitting down for a series of in-depth interviews with former U.S. Secretary of Defense Donald Rumsfeld, who memorably resigned in 2006 after being accused of woeful mismanagement of President George W. Bush's Iraq War. The in-development documentary will cover the length of Rumsfeld's political career, which spanned 40 years, and could well serve as a companion piece to Morris' Academy Award-winning doc, The Fog of War, where he profiled another former U.S. Secretary of Defense—in that case Robert S. McNamara—as a means to explore the Vietnam War. Meaning, it's possible Morris's upcoming feature will investigate the War on Terror.