Chuck Hagel: “We reduce reliance on nuclear weapons as a vital contribution to preventing that proliferation.”

Not everyone at the White House has agreed with me.

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

Well, first recognize that we have a problem and then start addressing the problem, locally, nationally, globally.

Our nuclear deterrent plays a critical role in assuring U.S. national security and it is DOD'S highest priority mission. No other capability we have is more important.