91.   Investigators continue to hope that one will show the telltale damage of a bomb or missile explosion, or somehow demonstrate that a cataclysmic mechanical failure occurred.

92.   Investigators who examined the wreckage Sunday said they were focusing on mechanical failure as the cause of the crash.

93.   It poses a greater threat to aircraft than mechanical failure, pilot error or foul weather, according to a study by the Department of Agriculture.

94.   Kallstrom said the agency believes the airliner was downed either by a bomb inside it, a missile or a massive mechanical failure.

95.   Many shrugged off the crash, assuming it was due to mechanical failures that are an inherent part of flying.

96.   Mechanical failure?

97.   Mechanical failures and collisions have taken Fittipaldi out of races all season long.

98.   Mechanical failure was blamed for that crash.

99.   Most crashes are caused by a bomb, mechanical failure or pilot error, Pope said.

100.   Mechanical failure.