Can some one tell me the story of 9/11 please i am wanting to learn about it

On September 11, 2001, nineteen terrorists , , hijacked four commercial airplanes. In a coordinated attack, the hijackers intentionally flew two of the planes into the Twin Towers of the World Trade Center, and a third into the Pentagon. The September 11 attacks were a series of airline hijacking  committed in 2001 by 19 terrorists It was the deadliest terrorist attack on U.S. soil; nearly 3,000 people were killed .The terror attacks on September 11, 2001, were the deadliest attacks on US soil since the Pearl Harbor bombing. Nearly 3,000 people lost their lives on September 11, 2001, after al Qaeda hijackers flew airplanes into the Pentagon and the World Trade Center in New York. It was the deadliest  attack on U.S. soil; nearly 3,000 people were killed. Sep 11, 2020 — Smoke, flames and debris erupts from one of the World Trade Center towers as a plane strikes it Tuesday, September 11, 2001.

Explanation:

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.