The future belongs to young people with an education and the imagination to create.

When our sailors in the Persian Gulf accidentally strayed into Iranian waters, that could have sparked a major international incident. Some folks here in Washington rushed to declare that it was the start of another hostage crisis. Instead, we worked directly with the Iranian government and secured the release of our sailors in less than 24 hours.

To all those watching tonight from beyond our shores, from parliaments and palaces, to those who are huddled around radios in the forgotten corners of the world, our stories are singular, but our destiny is shared, and a new dawn of American leadership is at hand.

The bottom line is this - whereas Iran was steadily expanding its nuclear program, we have now cut off every single path that Iran could have used to build a bomb.

True leadership will not be measured by the ability to muzzle dissent, or to intimidate and harass political opponents at home. The people of the world want change. They will not long tolerate those who are on the wrong side of history.

And that, I suppose, is what I'd been trying to tell my mother that day: that her faith in justice and rationality was misplaced, that we couldn't overcome after all, that all the education and good intentions in the world couldn't help you plug up the holes in the universe or give you the power to change its blind, mindless course.

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.