I think the Iranians are clearly determined to have a nuclear program. And we have to assume that with a nuclear program they have the capability and the will to create a nuclear weapon.

Endeavors succeed or fail because of the people involved.

Leaders honor their core values, but they are flexible in how they execute them.

There is no such thing as an unimportant person in an organization.

I have always admired the Linking Pin theory of management specialist Rensis Likert. It says that in every organization there are leaders who link the lower level to the upper level. What makes somebody an effective link as a leader is that he conveys down everything that above wants and he conveys up everything that below needs.

Some of the generals are saying, 'We're making progress. We are clearing an area.' But you really don't defeat the Taliban by clearing an area. They move.

Today I can declare my hope and declare it from the bottom of my heart that we will eventually see the time when that number of nuclear weapons is down to zero and the world is a much better place.