Sixteen acres of land surrounding the site of the Sept. 11, 2001, attack on the World Trade Center are being rebuilt. Eight are devoted to honoring the victims.
The terrorist attacks of Sept. 11, 2001, had a profound effect on the United States -- and the world. Trace the progression of events in this timeline.
The events of Sept. 11, 2001, left America and much of the world wondering who could have been responsible for the devastating attacks. Who exactly hijacked and flew the planes, and how did they get involved with the plot?
The confusion and terror following the Sept. 11 attacks on the World Trade Center left many searching for answers. Some conspiracy theorists point to conflicting reports and murky political agendas in their alternative versions of the event.
September 11 Museum
Response & Recovery
After Hurricane Katrina struck the Gulf Coast of the United States, most of us saw what the Red Cross can do -- and what it cannot do. Learn about the functions and history of the American Red Cross.
Long before Sept. 11, governments, guerrillas, freedom fighters and insurgents were hijacking planes, plotting to blow up the British parliament and generally sowing fear to achieve an objective. So why is defining terrorism so hard?
For centuries, terrorists plundered European and U.S. ships in the Mediterranean. Who were the perpetrators, and how did America put an end to their kidnapping, enslavement and extortion?
Terrorists work very hard to remain undetected. After all, if we knew where they were, we could stop them from attacking. But they usually work in small groups, or even alone. How do law enforcement officials track them down?
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It's safe to say most every American is familiar with the two magic words: "American dream." But what is this dream exactly? And how do you know if you're living it?
On Sept. 11, 2001, terrorist attacks on America altered the world's political and military landscape. How much do you really know about the history of these atrocities?