The findings suggest that even a half-hour walk at a quick speed every day could lower the risk of cognitive impairment.

VOA: special.2011.07.27

I watched it for perhaps a half-hour until my curiosity got the better of me.

VOA: special.2009.12.07

Stephen Mbugua has a farm a half-hour's drive from the capital.

VOA: special.2009.11.02

During the two-and-a-half hour moon walk, the astronauts frolicked in the weightlessness of outer space and planted an American flag in the lunar surface.

VOA: standard.2009.07.16