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Chicago | Willis Tower Revitalization
Feb 2017 Update: http://skyrisecities.com/news/2017/02/500-million-revamp-proposed-chicagos-iconic-willis-tower
March 2017 Update: http://skyrisecities.com/news/2017/03/willis-tower-upgrade-may-feature-rappelling-glass-ledgewalk
Feb 2017 Update: http://skyrisecities.com/news/2017/02/500-million-revamp-proposed-chicagos-iconic-willis-tower
March 2017 Update: http://skyrisecities.com/news/2017/03/willis-tower-upgrade-may-feature-rappelling-glass-ledgewalk
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