Describes the September 11 attacks in the United States and presents several personal stories of tragedy told by New Yorkers who lived through the collapse of the World Trade Center.

Discusses the events surrounding the attacks on the World Trade Center and the Pentagon on September 11, 20001, and describes the experiences of those involved and the impact of these attacks.

An account of events surrounding the terrorist attacks that took place at the World Trade Center in New York City, at the Pentagon near Washington, D.C., and in rural western Pennsylvania on September 11, 2001.

Describes the September 11, 2001 terrorist attack on New York City, in which two airplanes were crashed into the World Trade Center, and the rescue and recovery work that occurred afterwards.

When Welles Crowther was a young boy in Nyack, NY, his father gave him a red handkerchief to keep in his back pocket, in case he ever needed it. He kept it with him on the way to church that day and nearly every day after. It was a fixture as he grew up, tucked in jeans or wrapped around his head as he played lacrosse for Boston College. The bandanna was a signature, long before it became a symbol. Welles was like a lot of us, if just a bit better...

Text, photographs, and illustrations from the New York Times section, "A Nation Challenged, " record how the world was changed due to the September 11, 2001, terrorist attacks on the United States and their aftermath.