And when the system fails, it is my responsibility." President Obama campaigned on a promise of "change we can believe in."

VOA: special.2010.01.23

But she says there is much evidence that nicotine in tobacco smoke affects the nervous system, and child development and behavior.

VOA: special.2009.01.13

Workers built a huge system of waterways and pumping stations to control the overflow of Lake Okeechobee, north of the Everglades.

VOA: special.2009.06.30

But with threats, a language barrier and fear of the legal system, victims are often unwilling or unable to seek help.

VOA: special.2010.06.14

Coming up with a plan to fix the banks and the financial system is now the job for Tim Geithner.

VOA: special.2009.01.30

The United States Forest Service soon had trees planted in some areas and a rough road system built.

VOA: special.2009.07.20

Hershey's town was modern. It had nice houses,large public buildings, and an electric railway system for easy transportation.

VOA: special.2010.12.05

He had Huntington's Chorea, the same disease of the brain and nervous system that had killed his mother.

VOA: special.2010.06.20

C.D.C. official Janet Collins says breathing secondhand smoke has immediate harmful effects on a person's heart-and-lung system.

VOA: special.2009.01.07

It uses Google's Android mobile operating system and is meant to work easily with Google's Web-based services.

VOA: special.2010.01.26

Day trading companies provide a desk and a computer system to an investor who wants to trade.

VOA: special.2009.04.26

His election could also affect other areas, like climate change legislation and reforms in the financial system.

VOA: special.2010.01.22

One big announcement this year involved the British company ARM and the Microsoft Windows operating system.

VOA: special.2011.01.10

But people of all opinions feared that the president was trying to destroy the careful system of checks and balances in the federal government.

VOA: special.2011.04.21