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Narrator: Sierra Nevada Corporation's Dream Chaser flight vehicle rolled through a series

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of ground tests at NASA's Dryden Flight Research Center.

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Sierra Nevada Corp Employee: and you are go to arm post separation and change ů ready.

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Sierra Nevada Corp Employee: 40 mph.

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Sierra Nevada Corp Employee: tow arm and change ů ready.

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Narrator: After arriving at the California facility in May, workers un-wrapped the test spacecraft

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and attached its wings and tail.

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Then, a pickup truck pulled the winged vehicle at intervals of 10, 20, 40 and 60 miles per hour

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on concrete runways to help assess its braking and landing systems.

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Sierra Nevada Corp Employee: ready, release.

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Narrator: These tests are preparing company engineers for upcoming

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captive-carry and free-flight tests at Dryden.

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Sierra Nevada Corporation is one of three American companies working with