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(rock music)

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- [T. Keith Glennan] We have
one of the most challenging

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assignments that has ever
been given to modern man.

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Expansion of human knowledge about space.

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- [General John B. Medaris]
We've been assigned the mission

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of launching a scientific
Earth satellite.

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- [Man] Five, four, three, two, one.

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By command, by command.

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- [T. Keith Glennan] Development
and operation of vehicles

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capable of carrying instruments
and man through space.

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- [Neil Armstrong] That's
one small step for man,

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one giant leap for mankind.

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- [T. Keith Glennan] Long range studies

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of the benefits of using

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aeronautical and space
activities for peaceful

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and scientific purposes.

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(crowd cheering)

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- [Male] Five, four, three,
two, one and liftoff.

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And a new era of American
space exploration.

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- [T. Keith Glennan]
Preservation of the role

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of the United States as
a leader in aeronautical