In 1959, Fidel Castro created the Cuban Institute of Cinematographic Art and Culture (Spanish acronym: I.C.A.I.C.), the agency in charge of film production and distribution. The institute owned and controlled cinemas, oversaw all Cuban film productions and monitored imported films. View an excerpt from an I.C.A.I.C. newsreel of Castro's visit to the U.S.S.R. in 1972.

In 1959, Fidel Castro created the Cuban Institute of Cinematographic Art and Culture (Spanish acronym: I.C.A.I.C.), the agency in charge of film production and distribution. The institute owned and controlled cinemas, oversaw all Cuban film productions and monitored imported films. View an excerpt from an I.C.A.I.C. newsreel on the queue of asylum-seekers in 1980.

In May of 1942, across the rugged sub-Arctic wilderness of Alaska, British Columbia, and Yukon Territory, thousands of American soldiers began one of the biggest and most difficult construction projects ever undertaken -- the building of the Alaska Highway.

How did they do it? Find out in this eighteen-minute film, Building the World Trade Center, produced by the Port Authority of New York and New Jersey in 1983 with original footage of the towers under construction.

Writer Pete Hamill talks about New York before the World Trade Center, the New York economy, what was destroyed to build the towers, and getting used to the World Trade Center.

Architectural historian Carol Willis discusses the opposition to the World Trade Center, the public's opinion of skyscrapers, and rebuilding at Ground Zero. Willis was interviewed during the making of Ric Burns' New York: The Center of the World.

Engineer for the World Trade Center, Leslie Robertson discusses architectural aspects of the buildings, including the sculptural quality, close columns and narrow windows, the skin structure, and the comparison to the Empire State Building.

Historian Niall Ferguson talks about the American Experience of globalization, globalization's political dimension, and 9/11 as a turning point.

Journalist William Langewiesche tells the story of one 9/11 survivor. "When he woke up, he was on top of the pile, on top of a huge slab," says Langewiesche.

Former New York governor Mario Cuomo talks about lessons learned from 9/11 and evolving toward a new civility.

Historian Mike Wallace discusses the US and global interests, Lower West Side business, and the opposition to building the World Trade Center.

President of the World Trade Center Association, Guy Tozzoli, discusses the planning, construction and operation of the World Trade Center.

Photographer Camilo Jose Vergara discusses the visual impact of the World Trade Center from different perspectives.

High wire artist Philippe Petit electrified New York City -- and the world -- with his early morning walk between the twin towers on August 7, 1974. Here he discusses his preparation for the walk and the high wire journey itself.

Three-term mayor of New York City Ed Koch describes a moment on September 11, 2002.

Architecture critic Ada Louise Huxtable discusses the options for building at Ground Zero and speaking to the spirit of the location.

The south tower of the Golden Gate Bridge was built over a thousand feet into open ocean. To build the tower, workers would have to erect a pier more than 1100 feet out in the middle of the Gate -- the first bridge support ever constructed in the open ocean. Divers guided beams, panels, blasting tubes and 40-ton steel forms into position and secured them, striving to avoid being swept away.

Cable spinning began in October 1935. To create the cables, Roebling developed a method called parallel wire construction. The innovative technique enabled a cable of any length and thickness to be formed by binding together thin wires. Hundreds of wires, each roughly the diameter of a pencil, were bound together into strands. Hydraulic jacks then bundled and compressed 61 strands to make a cable.

Construction on the bridge began in January 1933. Workers excavated 3 1/4 million cubic feet of dirt to make way for the bridge's anchorages, one on each side of the Gate.

The first 745-foot tower began to rise in Nov. 1933. Prefabricated sections were fit into place and then joined together by four-man rivet gangs. The heater was the boss; he brought rivets to the right temperature on a small forge, then tossed them to catchers with metal cans.