Recent events have shown us that what sets us apart must not just be our power; it must also be the purpose behind it. In south Sudan--with our assistance--the people were finally able to vote for independence after years of war. Thousands lined up before dawn. People danced in the streets. One man who lost four of his brothers at war summed up the scene around him. "This was a battlefield for most of my life," he said. "Now we want to be free."

And we saw that same desire to be free in Tunisia, where the will of the people proved more powerful than the writ of a dictator. And tonight let us be clear: The United States of America stands with the people of Tunisia and supports the democratic aspirations of all people.

We must never forget that the things we've struggled for and fought for live in the hearts of people everywhere. And we must always remember that the Americans who have borne the greatest burden in this struggle are the men and women who serve our country.

Tonight let us speak with one voice in reaffirming that our Nation is united in support of our troops and their families. Let us serve them as well as they've served us, by giving them the equipment they need, by providing them with the care and benefits that they have earned, and by enlisting our veterans in the great task of building our own Nation.

Our troops come from every corner of this country. They're Black, White, Latino, Asian, Native American. They are Christian and Hindu, Jewish and Muslim. And yes, we know that some of them are gay. Starting this year, no American will be forbidden from serving the country they love because of who they love. And with that change, I call on all our college campuses to open their doors to our military recruiters and ROTC. It is time to leave behind the divisive battles of the past. It is time to move forward as one Nation.

We should have no illusions about the work ahead of us. Reforming our schools, changing the way we use energy, reducing our deficit, none of this will be easy. All of it will take time. And it will be harder because we will argue about everything: the costs, the details, the letter of every law.

Of course, some countries don't have this problem. If the central government wants a railroad, they build a railroad, no matter how many homes get bulldozed. If they don't want a bad story in the newspaper, it doesn't get written.

And yet, as contentious and frustrating and messy as our democracy can sometimes be, I know there isn't a person here who would trade places with any other nation on Earth.

We may have differences in policy, but we all believe in the rights enshrined in our Constitution. We may have different opinions, but we believe in the same promise that says this is a place where you can make it if you try. We may have different backgrounds, but we believe in the same dream that says this is a country where anything is possible, no matter who you are, no matter where you come from.

That dream is why I can stand here before you tonight. That dream is why a working class kid from Scranton can sit behind me. [Laughter] That dream is why someone who began by sweeping the floors of his father's Cincinnati bar can preside as Speaker of the House in the greatest nation on Earth.