CN Tower EdgeWalk, Toronto, Ontario, Canada

In August 2000, a fire broke out at the Ostankino Tower in Moscow. It killed three people and caused extensive damage. The fire was blamed on poor maintenance and outdated equipment. The failure of the fire-suppression systems and the lack of proper equipment for firefighters allowed the fire to destroy most of the interior and spark fears the tower might even collapse.
The Ostankino Tower was completed only nine years before the CN Tower, and is only 13 metres (44 ft) shorter. The parallels between the towers led to some concern that the CN Tower could be at risk of a similar tragedy. However, Canadian officials subsequently stated that it is "highly unlikely" that a similar disaster could occur at the CN Tower as it has important safeguards that were not present in the Ostankino Tower. Specifically, officials cited:
• the fireproof building materials used in the tower's construction,