The single biggest threat that we face is a nuclear weapon or some weapon of mass destruction. What that means is that we have to be extraordinarily aggressive and vigilant in controlling nuclear proliferation.

What Washington needs is adult supervision.

I think that dealing with guns is one way to handle the violent-crime issues that we have in this country.

Young people: I understand this is important to you, but as you be thinking about climate change, the economy and jobs, war and peace, maybe way at the bottom you should be thinking about marijuana.

I wouldn't consider them acts of war, but I would consider them acts of property damage, commercial theft that are serious.

I believe that we have better ideas. But I also believe that good ideas don't matter if people don't hear them.

So Americans understand the costs of war. Yet as a country, we will never tolerate our security being threatened, nor stand idly by when our people have been killed. We will be relentless in defense of our citizens and our friends and allies. We will be true to the values that make us who we are.