Cheney remains staunch in his convictions on issues from the invasion of Iraq to the use of torture. Telling NBC News in an interview that "there are gonna be heads exploding all over Washington" as a result of the revelations in the book, Cheney's memoir follows one by his colleague and friend Donald Rumsfeld. As each promotes his own version of history, there are people challenging and confronting them.

Rumsfeld's book title, "Known and Unknown," is drawn from a notorious response he gave in one of his Pentagon press briefings as secretary of defense. In Feb. 12, 2002, attempting to explain the lack of evidence linking Iraq to weapons of mass destruction, Rumsfeld said: "[T]here are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns—the ones we don't know we don't know."

Rumsfeld's cryptic statement gained fame, emblematic of his disdain for reporters. It stands as a symbol of the lies and manipulations that propelled the U.S. into the disastrous invasion and occupation of Iraq.

One person convinced by Rumsfeld's rhetoric was Jared August Hagemann.

Hagemann enlisted in the Army to serve his country, to confront the threats repeated by Defense Secretary Rumsfeld. When the U.S. Army Ranger received the call for his most recent deployment (his wife can't recall if it was his seventh or eighth), the pressure became too much. On June 28, 2011, 25-year-old Hagemann shot himself on the Joint Base Lewis-McChord, near Seattle. The Pentagon notes that Hagemann died of a "self-inflicted" gunshot wound, but has not yet called it a suicide.

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