The world series attack was a series of four coordinated terrorist attacks<span> by the </span>Islamic terrorist<span> group </span>al-Qaeda<span>on the </span>United States<span> on the morning of Tuesday, September 11, 2001.
</span> the islamic terrrorist group killed 2,996 people, injured over 6,000 others<span>, and caused at least $10 billion in infrastructure and property damage.. </span> Four passenger airliners<span> operated by two major U.S. passenger </span>air carriers<span> (</span>United Airlines<span> and </span>American Airlines<span>) were </span>hijacked<span> by </span>19 al-Qaeda terrorists<span>.
Two of the planes, </span>American Airlines Flight 11<span> and </span>United Airlines Flight 175<span>, were crashed into the North and South towers, respectively, of the </span>World Trade Center<span>complex in </span>New York City<span>.
Within an hour and 42 minutes, both 110-story </span>towers collapsed<span>, with debris and the resulting fires causing partial or complete collapse of all other buildings in the World Trade Center complex, including the 47-story </span>7 World Trade Center<span> tower, as well as significant damage to ten other large surrounding structures.
A third plane, </span>American Airlines Flight 77<span>, was crashed into </span>the Pentagon<span> (the headquarters of the </span>United States Department of Defense<span>) in </span>Arlington County, Virginia<span>, leading to a partial collapse of the building's western side.
The fourth plane, </span>United Airlines Flight 93<span>, initially was steered toward </span>Washington, D.C.<span>, but crashed into a field in </span>Stony creek Township<span> near </span>Shanksville, Pennsylvania<span>, after its passengers tried to overcome the hijackers.
9/11 was the single </span>deadliest incident for firefighters<span> and </span>law enforcement officers[4]<span> in the </span>history of the United States<span>, with 343 and 72 killed respectively.</span>