“My personal dream is to build a mud skyscraper right in Manhattan... [T]his dream isn't so crazy if you think of the mud city of {{w|Shibam}} in Yemen that was built in the 16th century, and has lasted now for 500 years. What was possible that long ago is possible today as well, and we can apply all our technical know-how to... these ancient materials, so that it meets our needs and our dreams.”