Question 115: What major event happened on September 11, 2001 in the United States?
Official answers (any one counts)
USCIS accepts any of these answers. If the question asks for more than one, give as many as it asks.
- 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
Grandpa explains
That day terrorists took over four planes and almost 3,000 people died. It is remembered with great respect.
Careful: these are NOT the answer
These are the common mix-ups. The app uses them as traps so you practice.
- The United States landed on the moon
- The Berlin Wall fell in Germany
- A big earthquake hit California
On the 2008 test this is question 86
If you filed your N-400 before October 20, 2025, you take the 2008 version. Which one is mine?
What major event happened on September 11, 2001, in the United States?
- Terrorists attacked the United States.
Video lesson on this topic: The 1900s and Today
More questions on this topic
- 116Name one U.S. military conflict after the September 11, 2001 attacks.
- 117Name one American Indian tribe in the United States.
- 118Name one example of an American innovation.
- 100Name one war fought by the United States in the 1900s.
- 101Why did the United States enter World War I?
- 102When did all women get the right to vote?
← All 128 questions · The 20 questions for 65/20
Official sources:
- USCIS · 128 Civics Questions and Answers (2025 version), M-1778 (09/25) ↗ · checked October 6, 2026
The plain explanation is ours; the official answers are USCIS's, word for word.