When it comes to new ultra-tall towers, the sky is the limit by Vivienne West

Magazine: Time Magazine
Date: July 20, 2015
Article: When it comes to new ultra-tall towers, the sky is the limit
Page: 20
Author:  Vivienne Walt
U-$1.00-B-0.0046743907-BE-214

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Answer Key
1. Adrian Smith designed Dubai's Burj Khalifa.
2. Gordon Gill and Adrian Smith are designing Kingdom Tower in Jidda, Saudi Arabia.
3. Kingdom Tower is taller than Burj Khalifa.
4. Kingdom Tower has double-deck elevators so they can stop at two floors at once.
5. Saudi Billionaire Prince Alwaleed bin Talal is financing the Kingdom Tower.
6. Kingdom Tower will be located in the suburb of Kingdom City.
7. Kingdom Tower is expected to cost $1.23 billion.
8. Burj Khalifa cost $1.5 billion.
9. Architect Adrian Smith is from Chicago.
10. The Empire State Building is 1,454 feet.
11. The One World Trade Center is 1,792 feet.
12. The Wuhan Greenland Center is 2,087 feet.

Reference
http://time.com/author/vivienne-walt/
https://en.wikipedia.org/wiki/Jeddah_Tower
http://architizer.com/blog/kingdom-tower-10-facts/