The risk of just one terrorist with just one nuclear weapon is a risk we simply cannot afford to take.

You always, I think, debate with yourself about whether or not you made the right decision. And you have to then give the person that you’re working for - in my instance, the president - your best judgment based on your understanding of the facts, but also the calculus you use to make a determination about what’s the best way to go forward.

Is real, it is serious, it is growing, and it constitutes one of the greatest threats to our national security and, indeed, to global security.

We know from the material that was recovered from the bin Laden compound that bin Laden was looking at the 10th anniversary of 9/11 as an opportunity to strike yet again at the U.S. homeland.

When we uphold the rule of law, our counterterrorism tools are more likely to withstand the scrutiny of our courts, our allies, and the American people.

Our democratic values also include - and our national security demands - open and transparent government. Some information obviously needs to be protected. And since his first days in office, President Obama has worked to strike the proper balance between the security the American people deserve and the openness our democratic society expects.

The risk of just one terrorist with just one nuclear weapon is a risk we simply cannot afford to take.