If resident doctors work shorter hours, the researchers said, errors could happen when one resident takes control of a patient's care from another.

VOA: special.2010.07.13

She had no idea that would happen when she arrived at the Academy.

VOA: special.2010.05.21

Poplar Island shows what can happen when many people and organizations cooperate.

VOA: special.2009.10.06

Brown outs happen when there is too much demand for electricity.

VOA: special.2009.11.15

Most injuries happen when flying objects hit people.

VOA: special.2010.05.11

The scientist says this mission has been planned for many years, but he is not sure when it will happen.

VOA: special.2010.05.25

They often become angry when things do not happen the way they planned.

VOA: special.2009.03.24

When that did not happen bombs were dropped and that ended the engagement."

VOA: standard.2009.09.12

Chan notes no one can predict what will happen later in the year when the southern hemisphere enters its influenza season and the virus spreads more rapidly throughout the population.

VOA: standard.2010.01.18

"What is special about the president of FIFA is that even at a point when there were skeptics who were saying this can not happen, he said it will happen."

VOA: standard.2010.07.05

At the conference,in London health-sector officials from around the world came together to try to find ways to make hospitals safer and stronger so that when disasters happen, health facilities will be more resilient.

VOA: standard.2009.10.14