41.   Investigators have not concluded whether the maintenance history contributed to the crash.

42.   Investigators concluded a cargo-hold fire caused the disaster, and they believe it started when the generators were jostled and activated.

43.   Investigators concluded that somebody carelessly tossed a cigarette or a match in trash.

44.   Investigators concluded, however, that the bombings were not connected to the speedway accident.

45.   Investigators finally concluded the plane did just that.

46.   Investigators have since concluded that the anthrax spores in that letter were unusually refined and dangerous.

47.   Investigators have since concluded that the sender did not have any inside information about the attack.

48.   Investigators later concluded that the agents were wounded in the attack, but not fatally.

49.   Investigators later concluded that the cause was structural damage.

50.   Investigators later concluded that the traces of chemicals on his hands had nothing to do with bomb making.