But first,we talk to some Americans who have retired from their professional lives but still work hard to help others.

VOA: special.2010.07.16

The Great Recession gave some mothers no choice but to work, as job cuts hit hard at men.

VOA: special.2010.04.23

Madam C.J.Walker explained it this way: "If I have accomplished anything in life, it is because I have been willing to work hard."

VOA: special.2010.03.28

The kinds of minerals in clay affect how soft or hard it is to work with.

VOA: special.2009.09.09

But he is hard at work. He and his team currently are trying to make algae that can change carbon dioxide back into fossil fuel.

VOA: special.2010.07.20

This is because my father rolls up his sleeves and prepares to work hard.

VOA: special.2010.05.02

Helen Keller had to work hard to support herself after she finished college.

VOA: special.2009.11.15

Some people may need to take medicines before they work hard or exercise.

VOA: special.2009.07.28

Yet the Mormons continued to work hard to make their settlement a success.

VOA: special.2009.06.04

Today,people can visit this building to experience this mailman's hard work and creativity.

VOA: special.2010.04.14

After a hard day's work, people gathered to tell each other funny stories.

VOA: special.2009.11.28

Work was hard to find in any of the cities in Europe.

VOA: special.2010.05.13

After a hard day's work, people gathered to tell each other stories.

VOA: special.2009.02.21

He decided to overcome his physical weaknesses through exercise and hard work.

VOA: special.2010.08.05