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Soviet Union launches Sputnik I
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NASA is formed
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Cosmonaut Yuri Gagarin becomes the first human to enter space and return safely.
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Alan Shepard becomes the first American man in space
May 5, 1961--With the launch of Freedom 7, Alan Shepard becomes the first American man in space -
The first US helicopters arrive in Vietnam, carrying 400 soldiers.
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US Helicopters Ordered to Shoot First
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Battle at Que Son Valley
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Largest Anti-War Protest
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Pres. Nixon Begins Withdrawal