After every major conflict - World War I, World War II, Korea, Vietnam, the fall of the Soviet Union - what happened was that we ultimately hollowed out the force, largely by doing deep across-the-board cuts.

I don't engage in hypotheticals.

People elected Donald Trump because he acts decisively. He fired James Comey. He didn't fire the entire FBI. If there's something there, the FBI is going to continue to investigate it.

Rising sea levels, severe draughts, the melting of the polar caps, the more frequent and devastating natural disasters all raise demand for humanitarian assistance and disaster relief.

I don't think there's any question that America is safer as a result of the bin Laden operation.

You don't deploy forces into harm's way without knowing what's going on.

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.