SpaceShipTwo's nitrous venting tested in-flight

SpaceShipTwo's nitrous venting tested in-flight:

Virgin Galactic's SpaceShipTwo left terra firma for her 24th glide flight on Wednesday morning. The flight was the first in which the loading and venting of the ship's nitrous system was tested. Virgin Galactic described the flight as "another key milestone on the way to our first powered flight." ..
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