The Ostankino Tower was completed nine years before the CN Tower , and is only 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 : Officials also noted that the CN Tower has an excellent safety record , although there was an electrical fire in the antennae on August 16 , 2017 — the tower 's first fire . Moreover , other supertall structures built between 1967 and 1976 — such as the Willis Tower ( formerly the Sears Tower ) , the World Trade Center ( until its destruction on September 11 , 2001 ) , the Fernsehturm Berlin , the Aon Center , 875 North Michigan Avenue ( formerly the John Hancock Center ) , and First Canadian Place — also have excellent safety records , which suggests that the Ostankino Tower accident was a rare safety failure , and that the likelihood of similar events occurring at other supertall structures is extremely low
destruction on September 11 , 2001
September 11 attacks
CN Tower