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In June 1962, after gruelling medical tests, Nasa announced its "New Nine". These would be the men to deliver on President Kennedy's pledge to put American boots on the Moon.

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"It is interesting that a lot of the things that we are addressing directly go to the points they raised in their report," Isaacman said Friday. "I can't say we actually collaborated on it because I generally think these were all pretty obvious observations."

Some smoke alarms have been designed to be ultra-sensitive. Aspirating devices, for example, constantly suck in air in order to detect even small quantities of smoke in a room. They are often used in commercial settings, including server rooms packed with expensive computer tech.

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