American History · Question 115 of 128 · 65/20

What major event happened on September 11, 2001 in the United States?

Official USCIS answers — any one is accepted

Terrorists attacked the United States
Terrorists took over two planes and crashed them into the World Trade Center in New York City
Terrorists took over a plane and crashed into the Pentagon in Arlington, Virginia
Terrorists took over a plane originally aimed at Washington, D.C., and crashed in a field in Pennsylvania

The plain-English explanation for this question is being written and checked. The official answer above is exact, as USCIS publishes it.

65/20 — This question is one of the 20 marked with an asterisk. If you are 65 or older and have been a lawful permanent resident for 20 years or more, you may study only those 20.