I think artificial intelligence will likely change the character of warfare, and I believe whoever masters it first will dominate on the battlefield for many, many, many years.

It is an honor of a lifetime to be appointed secretary of defense and to lead the greatest military in history.

Our adversaries must see diplomacy as their best option because war with the United States will force them to bear enormous costs.

Together, we will remain the most ready and capable military force in the world, which is what our nation expects and deserves.

We needed to go back on the offense and offer clear leadership on Iraq.

What's great about our leadership is they welcome other ideas.

I think where political issues invade moral situations, spiritual leaders have to speak out.

Anyone can show exceptional leadership ability in easy times. When all's going to plan, anyone can be inspirational/excellent/innovative and strong. The real question is how do you show up when everything's falling apart?