http://en.wikipedia.org/wiki/One_World_Trade_Center
http://www.wtc.com/media/images/s/wtc-construction-1-world-trade-center
http://www.thestar.com/news/gta/2012/10/20/cn_tower_climbers_take_1776_steps_to_the_top_for_united_way.html,
http://urbantoronto.ca/forum/showthread.php/16439-Oxford-Place-(MTCC-Redevelopment-Oxford-2x-70s-Foster-Partners)?p=723958#post723958