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

Answers from the USCIS list

Give this answer.

• Terrorists attacked the United States.

Our explanation

On September 11, 2001, terrorists attacked the United States. They took control of four airplanes. Two hit the World Trade Center in New York City. One hit the Pentagon, near Washington, D.C. One crashed in Pennsylvania.

Remember it

9/11 is the day terrorists attacked the United States.

Source

USCIS 2025 Study Guide (M-1175) p. 67: “On September 11, 2001, terrorists attacked the United States. Terrorists hijacked four airplanes. Two airplanes crashed into the World Trade Center in New York City.”

• Civics (History and Government) Questions for the Naturalization Test (2008 version), rev. 08/21 (PDF, USCIS)

Last checked on September 29, 2026.

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