Apr. 1939:

At the New York World’s Fair, an exhibit opens up, devoted to the concept of “world peace through trade.” This became the mission of the World Trade Center.

 

Feb. 1967:

Construction begins on the World Trade Center. The goal is to build it taller than the Empire State Building, which was the tallest building in the world at the time.

 

May 1968:

The owner of the Empire State Building, Lawrence Wien, runs an ad in the New York Times, claiming that an airplane could fly into the towers. There was an incident where a small plane flew crashed into the Empire State Building about 23 years earlier. The World Trade Center already made plans to protect against an accident like this.

 

April 4, 1973:

Construction officially concludes on both towers. The Twin Towers are the tallest building in the world for less than a year. The Sears Tower of Chicago broke the record in May.

 

August 1974:

French high-wire artist Philippe Petit walks a 140-foot high-wire between the towers. This stunt was unknown to Twin Tower officials. Petit and his group snuck into the building, disguised as construction workers. Although the police arrived on the scene, Petit still completed the 45-minute walk.

 

February 26, 1993:

A bomb explodes in the north tower’s parking garage on the second floor basement. It causes six deaths, over 1,000 injuries and about $600 million in damage. Six terrorists are convicted. 20 days later, the towers reopen with increased security measures in place.

 

July 24, 2001:

American businessman Larry Silverstein leased the Twin Towers for $3.2 billion. This was the largest transaction in New York’s history.

 

Sept. 11, 2001, 8:46 a.m.:

A hijacked airplane hit the north tower, crashing into the 94th floor through the 98th floor and igniting 3,000 gallons of the plane’s fuel.

 

Sept. 11, 2001, 9:03 a.m.:

Another hijacked airplane hit the south tower at a faster speed, crashing into the 78th floor through the 84th floor.

 

Sept. 11, 2001, 9:37 a.m.:

A third hijacked plane strikes the west wall of the Pentagon, killing 125 people.

 

Sept. 11, 2001, 9:59 a.m.:

The South Tower collapses.

 

Sept. 11, 2001, 10:07 a.m.:

A fourth hijacked plane crashed in Pennsylvania as passengers attempt to regain control of the plane. 45 people died. 

 

Sept. 11, 2001, 10:28 a.m.:

The North Tower collapses. Between the two towers, 2,823 people were killed. There were no survivors recovered from the debris. Volunteers will continue looking for 230 days.

 

Nov. 20, 2002:

Silverstein announces his plans to rebuild.

 

May 23, 2006:

The 7 World Trade Center opens.

 

Nov. 3, 2014:

The One World Trade Center opens.

 

Feb. 16, 2017:

Spotify, a music streaming app, moves its headquarters to the 4 World Trade Center.

 

2020:

The 2 World Trade Center plans to be completed.

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