Tulsa Public Schools delayed opening one preschool classroom this past fall because officials couldn't find a certified teacher until January.

WSJ: Oklahoma Is Public Preschool's Test Case

Kerry called for all "downer" cows -- those unable to walk into the slaughterhouse -- to be tested and not allowed into the food supply until certified as disease-free, as some other countries have mandated.

CNN: Democrats criticize administration over mad cow

The government said the airline could not fly until its planes were certified safe after the strike.

BBC: Kingfisher Airline to pay salary dues 'soon'

But the race was so close that no winner could be declared until the vote is certified by state elections board next week.

CNN: Kerry wins five states

Until recently, all their beers were certified organic and vegan, happily defying my assertion that organic beers are always compromised on flavour.

FORBES: Gout & About: A Slow Walk Through the Northern Quarter

Foods created through a process called mutagenesis, in which seeds are exposed to chemicals or radioactivity until their traits change, can be certified organic, Ronald says.

FORBES: Green Genes