But just one diarrhea accident can cause an infection for anyone who gets a mouth full of pool water.
More common, though still infrequently, Mr. Doyle said engineers notice an unusual bump or hitch in the rails as they drive along, and flag a potential problem before it can cause an accident.
This has been a necessarily thorough process in order to understand the cause of the accident.
According to Rio mayor Eduardo Paes, faulty construction is the likely cause of the accident.
"The only absolute fact is that we do not know the cause of this accident, " it said.
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That mark indicated that a break in the running rail could be the underlying cause of the accident.
The Army said the cause of the accident was unknown, but that terrorist involvement had been ruled out.
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His family do not believe he shot himself and think horseplay or an accident could have been the cause.
The police said the cause of the accident had not yet been established.
In a statement, the ferry company said it would work with investigators to determine the cause of the accident.
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Board chairwoman Deborah Hersman said it would be months before the board determines the probable cause of the accident.
The panel said the magnitude-9 earthquake that preceded the waves could not be ruled out as a cause of the accident.
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Russian military officials continued to claim that a collision with a British or American submarine was the cause of the accident.
Hersman said a lot of work remains to be done before the safety board rules on the probable cause of the accident.
While the cause of the accident is still under investigation, the timing for a retrospective on the work of the paparazzi is uncanny.
The cause of the accident is still under investigation, but the highway was wet and snowy at the time of the accident, Mr. Grossman said.
City inspectors are investigating the cause of the accident and have issued a cease-use order for the elevator involved, the Department of Buildings said Wednesday.
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Fox Sports released a statement Sunday night saying it hasn't determined the cause of the accident and it is suspending use of the camera system indefinitely.
It remains to be seen if space debris was the cause of the accident, as Columbia's crew compartment has not been recovered in any identifiable form.
Olansen said operators have recovered memory devices from the wreckage and will be pulling the data off of them for clues to the cause of the accident.
It is true that a spontaneous occurrence of the multiple system failures necessary to cause a severe accident and large radiological release is typically a very improbable event.
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Based on information provided thus far in the media and a review of the video, a shift in the cargo load seems a likely cause of the accident in my opinion.
FORBES: Deadly 747 Cargo Stall Unlikely In Passenger Airline
"The cause of the accident was that the signaller raised the barriers in error when the train was approaching and too close to be able to stop before reaching the level crossing, " the report said.
While a probable cause for the accident will not be known for months or longer, investigators will certainly be looking at what caused the aircraft to apparently stall and plummet to the ground, killing all seven on board.
FORBES: Deadly 747 Cargo Stall Unlikely In Passenger Airline
Accident is the overwhelmingly likely cause.
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The Rail Accident Investigation Branch (RAIB) highlighted sight as a possible cause in its report on last September's accident at Halkirk.
" He said Metro is working with the NTSB to find the "root cause" of the accident, and said he wanted to assure metro riders that the system "is as safe as it can be.
CNN: NTSB says train detection system failed in days before D.C. crash
In its settlement last year with the US Department of Justice of the criminal charges against it, BP admitted that negligence on the part of its employees -- along with other companies -- was a "proximate cause" of the accident.
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