We've got to remain energy-independent. It gives us much more power and freedom than to be worried about what goes on in the Middle East. We have enough worries over there without having to worry about that.
It's one of the reasons [Vladimir Putin invitation to U.S] why 50 national security officials who served in Republican information - in administrations have said that Donald [Trump] is unfit to be the commander- in-chief. It's comments like that that really worry people who understand the threats that we face.
We do have to worry about North Korea. They continue to develop their nuclear weapons capability, and they're working very hard on their ballistic missile capability.
Don't worry about things, that you can do better next time. Don't worry about stuff you can't control.
