US ambassador to NATO Kay Bailey Hutchison and NATO Secretary General Jens Stoltenberg took part in a solemn ceremony at the NATO headquarters in Brussels on Wednesday, to commemorate the 18th anniversary of the 9/11 attacks on the United States. The two officials laid a wreath by the 9/11 and Article 5 Memorial.

"We pause here today in front of this monument of metal, twisted by hate and violence, to remember the nearly 3,000 victims from more than 90 countries who were taken from us when terrorists attacked my country. As we stand here, we also remember the heroes of that day, including the first responders and the firefighters who raced in the harm's way to rescue," said Hutchison during her speech.

Stoltenberg also paid tribute to the victims of the attacks: "We remember the suffering, the sorrow and the staggering loss on that terrible morning in September 2001. We remember all those who were going about their business on an ordinary day, when the unthinkable happened."

The speeches were followed by a moment of silence.

The commemoration ceremony was also attended by ambassadors of NATO allies.

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