Mattis has been sharply critical of President Barack Obama's policies on Iran and Obama's capping of troop numbers and campaign end-dates in theaters of war such as Afghanistan and Iraq. Mattis also appears to be a skeptic of the Obama-era policy of putting women into combat roles.

The senior director at the NSC for the Middle East is retired Col. Derek Harvey, an Arabic-speaking intelligence officer with a Ph.D. who served as the head of the U.S. military cell examining the insurgency in Iraq in 2003.

An intelligence officer and historian, Rayburn published a 2014 book, 'Iraq After America,' which is a must-read for anyone who wants to understand how Iraq descended into chaos in the years after the American troop withdrawal at the end of 2011.

The hard reality is that attacks by vehicles in public places are very hard to defend against in a free and open society. The best defense against such attacks is good intelligence, and that often comes from inside the Muslim community.

It was not until the civil rights movement of the 1950s and '60s that Congress got serious about the assignment laid out in the post-Civil War amendments.

I grew up in a time when people believed in duty, honor and country. My grandfathers were both officers. My father was a General in the Air Force. My brother and I were both in the Army. I've always felt a kinship with soldiers; I think it's possible to support the warrior and be against the war.

It's never acceptable to target civilians. It violates the Geneva Accords, it violates the international law of war and it violates all principles of morality.

Society has arisen out of the works of peace; the essence of society is peacemaking.