25 years after 9/11, the attacks still shape America's place in the world

The September 11 attacks killed 2,977 people from over 100 countries and remain central to American politics and global strategy.

Why it mattersThe attacks changed how America wages war, runs security and acts abroad. Those changes are still felt today.

AustraliaAustralia was directly affected: Australian citizens died in the attacks, and Australia's military and diplomatic ties to the US deepened in response.

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