What recent event can be compared to The Twenty-First Century or 911?

a recent event that you could compare and contrast to something related to The Twenty-First Century

And then 9/11 happened, which changed everything. The attacks on the United States had worldwide implications. Aside from the war in Afghanistan - launched to take out the Taliban and combat al Qaeda - the War in Iraq (2003) was started off offaulty intelligence and rumors of a link between Saddam Hussein and Osama bin Ladin (there is no link).