1.   Investigators blamed a crack in the propeller.

2.   Congressional investigators blamed confused responsibilities and lack of accountability within the department.

3.   Fire investigators also blamed improperly installed wiring and smoke alarms that did not work.

4.   Fire investigators blamed faulty electrical wiring.

5.   Investigators are blaming driver error in both accidents.

6.   Investigators blamed underfunding and poor management oversight.

7.   Investigators blamed the losses of the Mars Climate Orbiter and the Mars Polar Lander on NASA mismanagement and underfunding.

8.   Investigators blamed the losses on underfunding and poor management.

9.   Investigators blame a cockpit fire but remain unsure of its cause.

10.   Investigators blame the motorman of the M train, who intentionally bypassed a red signal.