The terrorism from 9/11 has metastasized. It's metastasized in Iraq and Syria, in Nigeria, in Somalia, in Yemen and in other places in North Africa. We need a very comprehensive strategy to deal with that threat.

Iran is isolating itself from the rest of the world.

I think a quality that a national security adviser must have is the ability to set up procedures.

In this century, the 21st century, the U.S. recognizes our prosperity and our security depends even more on the Asia-Pacific region.

Go forward, knowing that you are greater than the challenges of your time.

The area of climate change has a dramatic impact on national security.

In the zero-sum budget game, every dollar spent on this problem [illegal immigration] must be taken from somewhere else....No, we should not tolerate people immigrating illegally. But we need to treat this issue honestly and fairly.