The fundamental premise is that neither the United States or the international community is going to allow Iran to develop a nuclear weapon.

Clearly, Russia has lied to the world about what's going on in Ukraine. They have clearly violated the cease-fire agreements.

The fundamental premise is that neither the United States or the international community is going to allow Iran to develop a nuclear weapon.

My experience is that the director of the FBI is particularly important to just how aggressive an investigation will be into an issue. And once you remove James Comey, it creates a vacuum at the top. And the fundamental issue will be whether or not there is support at the highest levels within the FBI to continue to conduct that investigation. That's going to be the question mark.

One of the principal qualities that you need as national security adviser is trust, the trust of the president. And that depends on truth and it depends on honesty.

These days, it takes only seconds - seconds - for a picture, a photo, to suddenly become an international headline.

The Taliban is resilient.