Two planes crashed deliberately into both towers of the World Trade Center at mid-morning on Tuesday. Within the hour, both buildings collapsed, sending huge flumes of dust and smoke billowing throughout the island of Manhattan.

Thousands of Palestinians celebrated Tuesday's terror attacks in the United States, chanting "God is great" and distributing candy to passers-by, even as their leader, Yasser Arafat, said he was horrified.

Reactions on the Internet to Tuesday's terrorist attack against the United States were swift and opinionated.

President George W. Bush on Tuesday condemned what he called an apparent "terrorist attack" on the World Trade Center and pledged the U.S. government will "hunt down" those responsible.

Security experts are stunned but not necessarily surprised that four domestic commercial jets were hijacked on Tuesday to carry out attacks on New York and Washington.

Terrorists left indelible images after crashing two planes minutes apart into the upper floors of both World Trade Center towers in New York.

Internet traffic slowed Tuesday as people headed online for news of attacks on the World Trade Center and the Pentagon, but major backbone networks appeared to hold up in the hours following the twin tragedies.

Many people reached for their phones after the attack on the World Trade Center towers to see if loved ones were safe. But many calls wouldn't go through.

Photo gallery of the events of the attack.

Rescue workers search for survivors in the aftermath.

Afghanistan's hardline Taliban rulers condemned the devastating terrorist attacks in New York and Washington on Tuesday and rejected suggestions that Osama bin Laden could be behind them.

Personalized Internet radio stations and technology websites abandoned their normal news-delivery operations as major Internet media outlets wilted under the crush of traffic following Tuesday's attacks in New York and Washington.

In the aftermath of the terrorist attacks in New York City, people on Internet auction sites are apparently bidding up the prices of World Trade Center memorabilia, attempting, they say, to find some items with which to remember the buildings now completely destroyed.

A coordinated terrorist attack on the United States Tuesday destroyed the World Trade Center in New York City, damaged the Pentagon in Washington and has all major American cities on tactical alert.

People trapped in buildings in Manhattan in the wake of the attacks on the World Trade Center are finding that e-mail and instant messaging are the best ways to contact their friends and loved ones, as the cell and land phone service in the city has been disrupted.

The terrorists who orchestrated Tuesday's strike on the World Trade Center clearly compromised airport security and raise questions about United States intelligence.

Information and links on the tragedy.

Astonishing terrorist strikes in the United States quickly reached a global audience Tuesday, with many around the world watching live coverage as both World Trade Center towers collapsed.