Unfortunately, in war, there are casualties, including among the civilian population.

- John O. Brennan

I will not, nor will I ever, publicly divulge sensitive intelligence sources and methods. For when that happens, our national security is endangered …

- John O. Brennan

As a former career intelligence professional, I have a profound appreciation for the value of intelligence. Intelligence disrupts terrorist plots and…

- John O. Brennan

How you define a problem shapes how you address it.

- John O. Brennan

Al-Qa'ida is the antithesis of the peace, tolerance and humanity that is at the heart of Islam.

- John O. Brennan

Jihad is holy struggle, a legitimate tenet of Islam meaning to purify oneself or one's community.

- John O. Brennan

I go to bed at night worrying that I didn't do enough that day to make sure I protect the American people.

- John O. Brennan

The preservation of our national security and the laws that define us as the United States of America demand that we understand the intersection of t…

- John O. Brennan

We will use all lawful tools at our disposal, and that includes authorities under the renewed PATRIOT Act. We firmly believe that our intelligence ga…

- John O. Brennan