Question

What happened on September 11, 2001?

1. The National September 11 Memorial and Flight 93 National Memorial opened. 2. Lawmakers created the Department of Homeland Security.

3. U.S. forces invaded the nation of Afghanistan, searching for Osama bin Laden. 4. Terrorists hijacked airplanes and attacked the United States.
I NEED AN ANSWER ASAP!!!!

Answer 1

The twin towers fell

Answer 2

Number 4. The most reasonable answer is #4. Terrorists did in fact hijack planes and attacked the USA/Twin Towers.