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

Miz Lisagore says some readers have decided to work harder to protect the environment.

VOA: special.2009.04.22

"There are some remaining technical minor problems, and our teams have been instructed to work as fast as possible."

VOA: standard.2010.06.24

According to Sahin, scientists have known for some time that conventional explanations for how parts of the brain work need to be revised.

VOA: standard.2010.01.15

"We are working hard toward an agreement. It is clear we have the major elements of an agreement in place and now we have to do the hard work of conforming the treaty and some other small negotiations,".

VOA: standard.2010.02.03