Astronauts worked for longer periods of time in the hostile environment of space.

VOA: special.2009.07.01

As generals on both sides learned, this method no longer worked.

VOA: special.2009.12.03

It worked. Carbon dioxide was no longer a problem.

VOA: special.2009.07.22

Neither Lott nor Clinton has worked longer than a couple of years in the private sector.

CNN: AllPolitics - TIME This Week

By then Priory was convinced that the traditional utility business model no longer worked.

FORBES: Trading places

It worked: no longer is there serious concern that French will disappear from North America.

ECONOMIST: Canada