HEPA filters capture almost all particles in the air that are zero point three microns in size or larger.

VOA: special.2009.07.14

At sixty degrees below zero, a man with wet feet must not fail in his first attempt to build a fire.

VOA: special.2010.05.01

"This is ground zero for the nation." Democrats in the state Senate fled to the neighboring Midwestern state of Illinois.

VOA: special.2011.02.25

And it can go from zero to ninety-five kilometers an hour in just two and one half seconds.

VOA: special.2009.11.03

The old men had told him that no man should travel alone in the Yukon when the temperature is sixty degrees below zero.

VOA: special.2010.05.01

The countdown reached zero just as Frank Borman and James Lovell, in Gemini Seven, passed overhead.

VOA: special.2009.07.01

Australia has set a November deadline to zero, for Japan to stop whaling in Antarctic waters, or face international court action.

VOA: standard.2010.02.20