9/11 attacks: By the numbers

NEW YORK -- The 9/11 terror attacks were the deadliest ever to occur on American soil.

A group of terrorists hijacked four airplanes, sending two of them into the World Trade Center towers and another into the Pentagon -- with the other flight crash landing in a Shanksville, Pennsylvania, field.

9/11 ANNIVERSARY: 18 years later, America vows to 'never forget'

There were 2,977 innocent lives lost.

It is a day that will never be forgotten in the hearts of the American people.

Here's a look back at the September 11 attacks by the numbers.

Victims:

• 2,977 people were killed



• 2,753 died at the World Trade Center Site



• 343 of them were New York City firefighters



• 23 were NYPD officers



• 37 were police officers from the Port Authority of New York and New Jersey



• 184 people were killed when American Airlines Flight 77 crashed into the Pentagon



• 40 were killed on United Airlines Flight 93 that crashed near Shanksville, Pennsylvania




• Countless victims and first responders are still dying due to 9/11-related illnesses

Facts:

• 19 men hijacked 4 planes



• 60 percent of the World Trade Center victims' remains have been identified as of Sept. 2019

PHOTOS: 9/11 attacks on the World Trade Center in New York City