1.   It senses the danger and almost instantaneously cuts off the power with a speed of reaction which can prevent a tragedy occurring.

2.   No-one knows whether openness could have prevented these tragedies.

3.   Although she is known for her work in comedy, working to prevent the tragedy of COPD has become a passion for Anderson.

4.   And they again failed to prevent the tragedy.

5.   Because past patterns of violence have shown that child killers almost always talk about their plans, every tip must be viewed as a chance to prevent a tragedy.

6.   A new medicine cabinet is designed to prevent tragedies.

7.   A Senate report on preventing future tragedies is not expected until next February.

8.   A swifter reaction to threats and knife-wielding, closer monitoring of troubled students and referrals to psychiatric counseling might have prevented this tragedy.

9.   Alatorre also said he did not know what security steps could have been taken to prevent the tragedy.

10.   But it can work hard to prevent further tragedies.