That is the longest period in United States history that the flag has remained unchanged.

VOA: special.2010.04.02

These include math,science, writing and United States history or government.

VOA: special.2009.10.22

David Odoviano wants to know about the history of interracial marriages in the United States, especially those between blacks and whites.

VOA: special.2010.09.03

Every week at this time, we tell the story of someone important in the history of the United States.

VOA: special.2010.06.27

Within two months of Cleveland's inauguration, the United States entered into one of the worst economic depressions in its history.

VOA: special.2010.06.10

The war between the United States and Spain in eighteen ninety-eight was one of the shortest in American history.

VOA: special.2010.07.29

Every week at this time, the Voice of America tells about someone important in the history of the United States.

VOA: special.2010.08.01

This week on our program, we talk about the newspaper industry in the United States and its history.

VOA: special.2009.04.20

Every week we tell about a person who was important in the history of the United States.

VOA: special.2009.06.28

Every week we tell about someone who was important in the history of the United States.

VOA: special.2009.11.15

I'm Shirley Griffith. And I'm Ray Freeman. Every week we tell about a person who was important in the history of the United States.

VOA: special.2009.11.08

For example,in the United States the tradition of making quilts has a long and rich history.

VOA: special.2009.11.04

The National Institutes of Health in the United States says about fifteen percent of people with Parkinson's have a family history of the disease.

VOA: special.2009.04.07

Every week we tell about a person important in the history of the United States.

VOA: special.2010.02.28

Every week,we tell the story of someone important in the history of the United States.

VOA: special.2010.03.28

This week,travel back in time to explore the history of transportation in the United States.

VOA: special.2010.01.11

The students and teachers at the United States Military Academy are proud of their history.

VOA: special.2010.11.19

They are important in the history of the Pueblo Indians of the Southwest United States.

VOA: special.2010.07.05

Anyone who has studied American history knows that the United States is a democracy.

VOA: special.2009.12.14

It was the longest strike and boycott in United States labor history.

VOA: special.2009.09.06

This event was extremely important in the history of the United States.

VOA: special.2009.01.07

And,Johnson points out, being a soldier was a great job for an African-American to have at that time in United States' history.

VOA: standard.2009.11.25

"I have no regrets about that. I think history will look back and say the President of the United States met his responsibilities,".

VOA: standard.2010.01.24