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[i]"The spacewalk is unusual. You can bet the crew will be very deliberate," said former NASA astronaut Tom Jones, an aerospace consultant who has participated in three spacewalks outside the space station. "But the added risk is probably not greater than the risk of the spacewalk itself." Explosive bolts have been used extensively on spacecraft, including NASA's manned shuttle, and on military aircraft for decades while accruing a good safety record, said Arthur Draut, a professor of aeronautical sciences at the Embry-Riddle Aeronautical University in Prescott, Ariz. "The technology is mature enough that handling the bolt is fairly safe," Draut said. "I don't see any danger from removing it."[/i]
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