Our tears are not enough. Our words and our prayers are not enough. If we really want to honor these twelve men and women, if we really want to be a country where we can go to work and go to school and walk our streets free from senseless violence, without so many lives being stolen by a bullet from a gun, then we're gonna have to change. We're gonna have to change.

History doesn't always move in a straight line. Sometimes it zigs and zags.

We've taken bold action at home by making historic investments in renewable energy, by putting our people to work increasing efficiency in our homes and buildings, and by pursuing comprehensive legislation to transform to a clean energy economy.

In an age where there's so much active misinformation and its packaged very well and it looks the same when you see it on a Facebook page or you turn on your television. Where some overzealousness on the part of, you know, a U.S. official is equated with constant and severe repression elsewhere.

I'm blown away. I'm flabbergasted the president [Barack Obama] made the phone call to Rouhani after 30-plus, `79, 33 years or so. And there's a reason we haven't negotiated with Iran, because they're state-sponsored terrorists. They're the central bank for terrorism around the world.

America is a strong and resilient country. And I know we will succeed, if we put aside partisanship and politics and work together as one nation.

We know that ISIL and other terrorist groups are actively encouraging people, around the world and in our country, to commit terrible acts of violence, oftentimes as lone-wolf actors.