CN Tower EdgeWalk, Toronto, Ontario, Canada

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,
• frequent and stringent safety inspections,