Tonight's State of the Union address will reflect President Barack Obama's focus on nation-building at home.

He will use the speech to call for more spending on infrastructure and manufacturing. And he will also announce the withdrawal of 34,000 U.S. troops from Afghanistan within a year.

That will cut the size of the U.S. troop presence there in half by next February -- putting the U.S. on pace to formally end the war there by the end of next year.

That won't be the only foreign policy issue Obama will mention tonight. In the aftermath of the latest North Korean nuclear test today, an aide says Obama will make the case that the North's nuclear program has only served to further isolate that country.

Obama is expected to spend the bulk of his time tonight on the economy and job creation. The economic blueprint he will discuss will have many of the elements Americans have heard before -- embracing manufacturing, energy development and education.

And as he speaks, many of the faces looking down from the House galleries will be those of Americans who've been thrust into the politics of gun violence.