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James Baldwin from "The Negro and the American Promise"

James Baldwin from "The Negro and the American Promise"

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19:57
Martin Luther King on "The Negro and the American Promise"

Martin Luther King on "The Negro and the American Promise"

Video
9:54
Introduction to "The Negro and the American Promise"

Introduction to "The Negro and the American Promise"

Video
2:13
Malcolm X on "The Negro and the American Promise"

Malcolm X on "The Negro and the American Promise"

Video
13:07
Emma Goldman and Opposition to the First World War

Emma Goldman and Opposition to the First World War

Video
2:44
Emma Goldman's Law-Defying Campaign For Birth Control

Emma Goldman's Law-Defying Campaign For Birth Control

Video
1:13
A Chasm Between Rich and Poor

A Chasm Between Rich and Poor

Video
1:51
A Bloody Labor Battle

A Bloody Labor Battle

Video
1:28
Emma Goldman: A Modern Joan of Arc

Emma Goldman: A Modern Joan of Arc

Video
1:02
A New Generation of Radicals

A New Generation of Radicals

Video
1:08
Golden Gate Bridge: Doing the Math

Golden Gate Bridge: Doing the Math

Video
2:21
Beginning Construction on the Golden Gate Bridge

Beginning Construction on the Golden Gate Bridge

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0:48
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American Experience

Engineering for High Winds

The structures needed not only to support the sheer weight of the 1,360-ft-tall buildings, but to overcome the even greater loads caused by the high winds of New York Harbor pushing against the wide, flat sides of the buildings, especially along their uppermost floors. The solution: a super-strong lattice of exterior steel columns, creating a remarkably stiff "tube" that could resist high winds.
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