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

They can even be deadly. Infections of the gums and teeth can release bacteria into the blood system.

VOA: special.2009.03.11

He plans to work to improve the legal system so that competing groups can settle their differences in court instead of the battlefield.

VOA: special.2009.01.28

MS symptoms can depend on where the nerve scars are in the body's central nervous system.

VOA: special.2009.01.06

Doctors can only hope that a person's defense system is strong enough to fight the disease.

VOA: special.2009.05.26

These substances can damage the human nervous system and natural defenses against disease.

VOA: special.2009.06.23

Systemic lupus can affect almost any organ or organ system in the body.

VOA: special.2010.06.15

Some drugs can be a problem because they suppress the immune system.

VOA: special.2009.04.14

The insect can carry a parasite that infects the central nervous system.

VOA: special.2010.04.07

"We have good partnerships among the countries within each agro-eco system so that through this twinning they can learn lessons from each other and work together effectively through time."

VOA: special.2010.02.08

Lead can damage the brain and the nervous system.

VOA: special.2009.08.31

The system also can help other countries.

VOA: special.2009.03.17

I can tell you around 50 percent of the total water that we produce becomes non-revenue for the system."

VOA: standard.2010.08.04

"I believe that a public option can achieve the goal of bringing meaningful reform to our broken system,"

VOA: standard.2009.10.26