On September 11, 2001 the 9/11 attacks took place. Four U.S. passenger planes were hijacked by small teams of terrorists. Two planes crashed into the Twin Towers of the World Trade Center in New York.

Add Yahoo as a preferred source to see more of our stories on Google. The World Trade Center has always been an iconic destination in New York City, drawing in thousands of tourists and workers alike.

The World Trade Center has always been an iconic destination in New York City, drawing in thousands of tourists and workers alike. Before the 9/11 attacks, employees would report to their offices in ...