31.   Investigators blamed the high death toll on locked emergency exits.

32.   Investigators tentatively have blamed a design flaw or metal fatigue in the door hinges for the Estonia sinking.

33.   Investigators have blamed negligence and faulty ventilation equipment.

34.   Investigators blamed locked emergency exits for the heavy casualties.

35.   Investigators had blamed the accident on poor construction work.

36.   Investigators have largely blamed the bombing on neofascists, but numerous probes have failed to result in conviction.

37.   Investigators later blamed a mechanical malfunction.

38.   Investigators blame that blast on dissident members of the Irish Republican Army, who they believe were trying to scuttle the Northern Ireland peace process.

39.   Investigators blamed the crash on shoddy maintenance.

40.   Investigators blamed the flight crew for the tragedy, saying the plane was flying too low and too fast when it hit the cable.