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3:57
Organizers illustrated some of the era's cultural stereotypes during the 1957 Jubilee.

2:00
For the 1960 Jubilee, participants follow instructions to paint a patriotic portrait.

1:41
In this 1960 Jubilee video, unexpected four-wheeled prizes inspire mania.

6:27
High wire artist Philippe Petit discusses his walk between the Twin Towers.

6:57
An interview with architectural historian Carol Willis for New York: Center of the World.

1:38
In the 19th century, the grain elevator was a revolutionary technology.

1:40
To solve city's water supply & sewage disposal problems, the Chicago River was reversed.

1:12
WARNING: GRAPHIC CONTENT: Lynching was a danger African-American men faced in the South.

0:51
The opening minutes of a 1960 film by a pro-segregation commission in Mississippi.

1:02
Photos of Till were published in newspapers and magazines.

1:15
In the 20th century, hundreds of thousands of African-Americans moved North.

1:06
The sad story of Emmett Till spurred the Civil Rights movement.