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

The one thing that I remember from all of my intelligence briefings and my dealings with the Russians is that when you deal with the Russians, you have to deal with them from strength, not from weakness.

I think my best advice would be to separate Donald Trump, the president of the United States from whatever investigation is being conducted by the FBI. I mean, there is something to be said, frankly, about the need for the appointment of an independent prosecutor because the American people are entitled to have a full review of what happened as a result of what the Russians did during our election.

The political and substantive reality is that the agenda has to change. I don't think they have any choice.

The consequence could be that we would have an escalation that would take place that would not only involve many lives, but I think it could consume the Middle East in a confrontation and a conflict that we would regret.

I know that young people sometimes, caught up in the moment, make some very foolish decisions.

The potential for the next Pearl Harbor could very well be a cyber-attack.