To keep Nigeria ONE, is a task that must be DONE.

We ask our men and women in uniform to leave their families, our guardsmen and reservists to leave their jobs. We ask you to fight, to sacrifice, to risk your lives for your country. The last thing you should have to do is fight for a job when you come home.

We cannot stop every act of senseless violence. We cannot know every evil that lurks in troubled minds. But if we can prevent even one tragedy like this, save even one life, spare other families what these families are going through, surely we've got an obligation to try.

As a product of history and faith, Jewish Americans have helped to open our eyes to injustice, to people in need, and to the simple idea that we ought to recognize ourselves in the struggle of our fellow men and women.

I continue to believe that she has not jeopardized America's national security. Now, what I've also said is that, and she's acknowledged, that there's a carelessness in terms of managing emails that she has owned and she recognizes. But I also think it is important to keep this in perspective. This is somebody who has served her country for four years as secretary of state and did an outstanding job, and no one has suggested that in some ways, as a consequence of how she handled emails, that that detracted from her excellent ability to carry out her duties.

It wasn't until about a year, year and a half in where I began to realize that the Pentagon and our national-security apparatus and the CIA were all getting too comfortable with the technology as a tool to fight terrorism, and not being mindful enough about how that technology is being used and the dangers of a form of warfare that is so detached from what is actually happening on the ground. And so we initiated this big process to try to get it in a box.

We may never understand what leads anybody to terrorize their fellow human beings. Such violence, such evil is senseless. It's beyond reason.