31.   Officials have spent countless hours and millions of dollars trying to prevent fresh tragedies, while also preparing for their seeming inevitability.

32.   One of the plaintiffs, Dr. Gulshan Harjee, hopes legal action will prevent future tragedies.

33.   Parents usually feel tremendous guilt when their apparently healthy child dies, wondering what they could have done to prevent the tragedy.

34.   Proponents of premarital counseling say education about marriage prior to the wedding day may prevent such tragedies.

35.   Pitts also talks about what parents can do to prevent tragedies such as the massacre in Colorado.

36.   Quayle said the nation needs a return to values to prevent future tragedies like the one that took so many lives in Littleton.

37.   Strict controls will be placed on its use to prevent the tragedy that occurred years ago when thalidomide was prescribed to pregnant women for use as a sedative.

38.   The device would prevent such tragedies, he said.

39.   They mentally replay those devastating images, or they have repetitive thoughts about what they could have done to prevent the tragedy.

40.   To help prevent future tragedies, the couple started the Richard David Kann Melanoma Task Force to educate the public about the prevention and early detection of melanoma.