They tell a detailed story about different events in America's past.

VOA: special.2010.01.27

In the past decade an average of almost 400 events each year have met the U.N.criteria for a natural disaster.

VOA: standard.2009.10.14

And the events of the past couple of days do not really improve confidence in the country and therefore foreign investors are very concerned."

VOA: standard.2010.02.26

They are steps that are working." Bernanke says the Federal Reserve and other economic policy makers have been challenged by unprecedented events in the past few years, but his objective has not changed.

VOA: standard.2009.08.25