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11 September 2001: Terror attacks close Wall Street

Terrorist attacks destroyed the World Trade Center in Lower Manhattan, steps from the New York Stock Exchange, killing nearly 3,000 people. US stock markets did not open and stayed closed for the rest of the week, the longest shutdown since 1933. Firms scrambled to restore communications and offices. The tragedy changed security, travel and geopolitics for decades, and markets reopened six days later.

The lesson: Some events are tragedies first and market events a distant second; resilience matters most.

11 September 2001: Terror attacks close Wall Street