File:Three World Trade Center, New York, NY.jpg - Wikimedia Commons
World Trade Center - Development, 9/11 Attacks & Rebuilding - HISTORY
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:no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/19185099/89_190907_19_28_17_5DSR6561.jpg "World Trade Center construction in New York City: photos - Curbed NY")
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FOX 5 / Fox5NY.com - The World Trade Center's Twin towers opened on this date in 1973. They were the tallest buildings in the world at the time. | Facebook
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File:Twin Towers under construction (1969).jpg - Wikimedia Commons
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World Trade Center - Development, 9/11 Attacks & Rebuilding - HISTORY
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NY's One World Observatory sets opening date | CNN Travel
World Trade Center - Development, 9/11 Attacks & Rebuilding - HISTORY
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20 Years And $20 Billion After 9/11, The World Trade Center Is Still A Work In Progress
