The Differences of the Twin Towers: North vs South
24:18
What's on the rooftops of Chicago's most famous skyscrapers?
1:04:18
9/11: Minute by Minute | Full Film
8:24
Citicorp Center | NYC skyscraper saved by a student’s question
10:54
What if only ONE of the Twin Towers fell?
27:32
Why New York's Skyscrapers Keep Changing Shape
52:44
Eyewitness to 9/11: Behind the Lens | Original News Coverage
24:15
What's on the rooftops of New York's most famous skyscrapers? - IT'S HISTORY
20:06