American officials say it will take at least two years for what one official called a meaningful measure of progress toward long-term stability.

VOA: special.2009.05.09

He says the final goal of the work is to develop a long-term plan to operate and protect the tomb for years to come.

VOA: special.2009.12.15

But the most common cause is long-term smoking or years of breathing other people's smoke.

VOA: special.2010.06.23

The most common cause of COPD is long-term smoking or years of exposure to second-hand smoke.

VOA: standard.2010.06.21

Sanford has served eight years as governor and cannot run again because of term limits.

VOA: standard.2010.06.08