"This accident hits especially close to home, with the involvement of an NTSB employee, " Hersman said.
"Charred battery components indicated that the temperature inside the battery case exceeded 500 degrees, " Hersman said.
The plane experienced g-forces exceeding the 9-g limit of the plane's accelerator, Hersman said.
"This pilot, in this airplane, had never flown this fast, on this course, " Hersman said.
"We are not here to put a stop to air racing, " Hersman said in a statement.
It is difficult for trained pilots to remain conscious with even 5 g's, Hersman said.
"Facebook is doing very well in Africa, " said Erik Hersman, a Kenyan-based blogger.
Neither event should have occurred on the Dreamliner, Deborah Hersman, chairwoman of the NTSB, said last week.
"Our goal is to get to zero deaths because each alcohol-impaired death is preventable, " NTSB Chairman Deborah Hersman said.
Despite sharp questioning from NTSB Chair, Deborah Hersman, both the FAA and Boeing witnesses failed to give satisfactory answers.
"Learning about Enbridge's poor handling of the rupture, you can't help but think of the Keystone Kops, " Hersman said.
Further, Boeing's indications that heat damage in one battery cell would not harm adjacent cells proved false, Hersman said.
Hersman said there was a telescoping effect when the second car slammed into the first and landed atop it.
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Ms Hersman added that the NTSB was "running through the macro level to the microscopic level on this battery".
Hersman's statements cast doubt on the safety of the battery technology and the FAA's certification process for approving technology.
Erik Hersman, who founded the iHub, is also a partner in Savannah Fund.
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Board chairwoman Deborah Hersman said it would be months before the board determines the probable cause of the accident.
"I would not want to categorically say that these batteries are not safe, " said Deborah Hersman, head of the NTSB.
Hersman said a lot of work remains to be done before the safety board rules on the probable cause of the accident.
"The assumptions used to certify the battery must be reconsidered, " Hersman said.
At a news conference later Saturday, Hersman said Washington state does not require signage unless the clearance is 14 feet, 4 inches or less.
"Most Americans think that we've solved the problem of impaired driving, but in fact, it's still a national epidemic, " NTSB Chairman Deborah Hersman said.
There should be nine data recorders aboard the first train, which will aid the investigation a great deal if they aren't damaged, Hersman said.
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Hersman said investigators believe the problem originated in cell six, which shows multiple signs of a short circuit -- an unintended path of electricity.
"Instead of stopping the flow, Enbridge staff twice pumped more oil -- about 81% of the total release -- into the ruptured pipeline, " Hersman said.
Hersman consulted with FAA Acting Administrator Michael Huerta and requested the Transportation Safety Board of Canada investigate the incident, she said in a statement Tuesday.
Hersman noted the aircraft was highly modified to improve its speed.
Boeing had estimated a "smoke" event would occur "less than once in 10 million flight hours" with the batteries, Deborah Hersman, the safety board's chairman, said.
Hersman does not expect the investigation to delay removal of debris from the river or work on a temporary solution to replace or repair the I-5 span.
Hersman said progress has been made over the years to reduce drunk driving, including a range of federal and state policies, tougher law enforcement, and stronger advocacy.
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