1.   ...the incident which triggered the outbreak of the First World War.

2.   It may be only a matter of time before goals trigger outbreaks of mass aerobics and the odd square dance.

3.   Because of that, state officials want to know what triggered the outbreak, McBride said.

4.   Soggy fields triggered an outbreak of disease in the Great Plains winter wheat crop, cutting yields and reducing quality.

5.   The report infers from circumstantial evidence that the outbreak was triggered by airborne viruses from a germ warfare test on an island in the Aral Sea.

6.   A new study put volunteers with this disorder on diets that included oats and found it did not trigger outbreaks.

7.   But droughts trigger outbreaks too, concentrating the spores that may have blown into shrinking water holes.

8.   City officials downplayed a report that suggests the CIA is investigating whether the recent West Nile-like encephalitis outbreak was deliberately triggered by Iraqi bioterrorists.

9.   Had the plot been carried out, it would likely have triggered an outbreak of violence, as Mulsims consider pigs unclean.

10.   Had the plot been carried out, it would likely have triggered an outbreak of violence, as Muslims consider pigs unclean.