Why is September 11,2001 a significant date in US history

 on september 11 there was a series of airline attacks from 19 terrorists associated with the Islamic extremist group. It was the deadliest terrorist attack on U.S. soil; nearly 3,000 people were killed.

Explanation:

The terror attacks on September 11, 2001, were the deadliest attacks on US soil since the Pearl Harbor bombing that launched the US into World War II. The plane hijackings that struck the World Trade Center, the Pentagon, and a Pennsylvania field killed 2,977 people.

The answer is The September 11 attacks were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda against the United States on the morning of Tuesday, September 11, 2001.

Explanation:There were 2,996 deaths, 25,000 injuries, As the evacuation of the tower and its twin got underway, television cameras broadcasted live images of what initially appeared to be a freak accident. Then, 18 minutes after the first plane hit, a second Boeing 767—United Airlines Flight 175—appeared out of the sky, turned sharply toward the World Trade Center and sliced into the south tower near the 60th floor.

The collision caused a massive explosion that showered burning debris over surrounding buildings and onto the streets below. It immediately became clear that America was under attack.(brainllest PLEASE)

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