New York entered a new era following the September 11, 2001 attacks, the worst terrorist attack ever to take place on American soil. Two of the four hijacked passenger jets crashed into the Twin Towers of the World Trade Center, destroying them, and killing almost 3,000 people. One flew into the Pentagon demolishing the walls. The final one was almost taken back over by the passengers aboard and crashed into an open grassland with 296 out of the 500 people dead. Thousands of New Yorkers volunteered their time to search the ruin for survivors and remains in the following weeks.