Chuck Hagel: “I think that is really the essence of the ultimate objective we'd like to see in Syria.”

American military power alone cannot and will not eradicate the threats posed by ISIL to the United States, our allies, and our friends and partners in the region.

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

Our nuclear deterrent plays a critical role in assuring U.S. national security.

That administration really laid out in 1991 and 1992 the threats of climate change, especially for national security.