His intervention prevented greater loss of life; the bomb exploded eight minutes after the train had passed by.
Other crucial questions - for example, does surgical intervention prevent problems at school and of language - are still unanswered.
Ill consequences threatened, of a sort that only timely intervention could prevent.
Early intervention could prevent some of the problems and costs of special education that occur in later life.
However, early intervention can prevent much greater need later on and avoid far more costly medical treatment in future.
In one town, only the intervention of the police prevented a scout car having its wheels removed.
He refused, and only the intervention of a moderate leader prevented any action that night.
Very early intervention may prevent potentially harmful complications and hospital admission.
The union's intervention prevented the university from lowering the per class rate for teachers.
Although the army's intervention prevented a full battle, tensions in the region were high.