Chuck Hagel: “In authorizing the use of force against Iraq, we are at the beginning of a road that has no clear end.”

When the National Guard opened up on students and killed students, partly because they weren't trained, they panicked.

There is going to be some severe reckoning and review, and a top-down, break it all down and asking themselves, who are we? What do we believe in?

Climate change is a national security threat.

Because I had the responsibility and I play my own game here. And that is because by law, I am the one official in government charged with certification with release of detainees. I take that responsibility very seriously.