http://www.seattletimes.com/seattle-news/northwest/space-needle-to-get-its-biggest-renovation-ever-glass-floor-opened-views-more-elevators/
http://www.bizjournals.com/seattle/news/2017/06/12/space-needle-glass-floors-renovation-restaurant.html
http://paleofuture.com/blog/2007/3/30/century-21-space-needle-designs-1962.html
https://www.google.ca/search?q=space+needle+renovation&source=lnms&tbm=isch&sa=X&sqi=2&ved=0ahUKEwim486zh7rUAhUK42MKHdDxDGUQ_AUIBigB&biw=1536&bih=760
http://paleofuture.com/blog/tag/seattle-worlds-fair