Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

September 11 attacks

The September 11 attacks, colloquially known as 9/11, were a coordinated series of suicide attacks perpetrated by the Islamic terrorist organization al-Qaeda against the United States in 2001. A total of 19 terrorists planned and subsequently hijacked four airliners, then flew one into each of the Twin Towers at the World Trade Center in New York City.…

Measurement, Background & Attacks

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around September 11 attacks. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Location
Financial District, Lower Manhattan, New York · Arlington County, Virginia · Stonycreek Township, Pennsylvania[a]
Attack type
Islamic terrorism · aircraft hijacking · suicide attack · mass murder
Convicted
Zacarias Moussaoui · Imad Yarkas · Mounir el-Motassadeq (see also: Trials related to the September 11 attacks)
Date
September 11, 2001; 24 years ago (2001-09-11) c. 8:13 a.m.[b] – 10:03 a.m.[c] (EDT)
Deaths
2,996[d] (2,977 in the attacks plus the 19 hijackers)
Injured
6,000–25,000+[e]

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Background

Attacks

Reactions

Aftermath

Investigations

Rebuilding and memorials

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

September 11 attacks

Nodes439
Edges438
Triples132
Avg. degree2
Density0.004556
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

September 11 attacks

Top relations

related to Congressional inquiry · 24
September 11 attacks → Bob Graham, CIA, Congress, December, FBI, House Permanent Select Committee, In December, In February, In June, In September, Intelligence, Intelligence Community, John Brennan, Justice Against Sponsors, Saudi Arabia, Saudi Arabian, Senate Select Committee, September, Terrorism Act, The
related to Government policies towards terrorism · 23
September 11 attacks → Anti-terrorism, Canada, Canadian Anti-Terrorism Act, Crime, Department, Germany, Homeland Security, Homeland Security Act, In, In Germany, Internet, Many, New Zealand, Prevention, Security Act, Terrorism Act, Terrorism Suppression Act, The, The FAA, The September
see also · 22
September 11 attacks → Another, Attacks, Cole, Islamist, Japanese, John, Kennedy, Khobar, New York CityOutline, Overview, Pearl Harbor, Previously, Qaeda, Qaeda1973 Chilean, Saudi ArabiaKorean, September, United States, United StatesKhobar Towers, United StatesList, United StatesTimeline
related to Military operations · 20
September 11 attacks → According, Americans, At, Best, Bush, Camp David, Defense Donald Rumsfeld, In, Iraq, Iraqi, Judge, Nonetheless, Not, OBL, Rumsfeld, Saddam Hussein's, Secretary, September, Stephen Cambone, Three
related to Alleged Saudi government role · 13
September 11 attacks → Congress, Dana Lesemann, File, Justice Against Sponsors, Michael Jacobson, Saudi, Saudi Arabia, Saudi Arabia's, September, Terrorism Act, The, The Obama, Washington
Attack type · 4
September 11 attacks → aircraft hijacking, Islamic terrorism, mass murder, suicide attack
Convicted · 3
September 11 attacks → Imad Yarkas, Mounir el-Motassadeq (see also: Trials related to the September 11 attacks), Zacarias Moussaoui
Location · 3
September 11 attacks → Arlington County, Virginia, Financial District, Lower Manhattan, New York, Stonycreek Township, Pennsylvania[a]
Target · 3
September 11 attacks → The Pentagon (AA 77), U.S. Capitol Building or the White House (UA 93; unsuccessful due to passenger revolt), World Trade Center (AA 11 and UA 175)
Date · 1
September 11 attacks → September 11, 2001; 24 years ago (2001-09-11) c. 8:13 a.m.[b] – 10:03 a.m.[c] (EDT)

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

attacks 11 world center bin united trade flight september states people al-qaeda one new laden also american 2001 pentagon hijackers

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
September 11 attacksAttack typeIslamic terrorism1.00infobox
September 11 attacksAttack typeaircraft hijacking1.00infobox
September 11 attacksAttack typesuicide attack1.00infobox
September 11 attacksAttack typemass murder1.00infobox
September 11 attacksConvictedZacarias Moussaoui1.00infobox
September 11 attacksConvictedImad Yarkas1.00infobox
September 11 attacksConvictedMounir el-Motassadeq (see also: Trials related to the September 11 attacks)1.00infobox
September 11 attacksDateSeptember 11, 2001; 24 years ago (2001-09-11) c. 8:13 a.m.[b] – 10:03 a.m.[c] (EDT)1.00infobox
September 11 attacksDeaths2,996[d] (2,977 in the attacks plus the 19 hijackers)1.00infobox
September 11 attacksInjured6,000–25,000+[e]1.00infobox
September 11 attacksLocationFinancial District, Lower Manhattan, New York1.00infobox
September 11 attacksLocationArlington County, Virginia1.00infobox
September 11 attacksLocationStonycreek Township, Pennsylvania[a]1.00infobox
September 11 attacksMotiveSeveral; see Motives for the September 11 attacks and fatwas of Osama bin Laden1.00infobox
September 11 attacksNo. of participants191.00infobox
September 11 attacksPerpetratorsAl-Qaeda led by Osama bin Laden The Hamburg cell (see also: responsibility)1.00infobox
September 11 attacksTargetWorld Trade Center (AA 11 and UA 175)1.00infobox
September 11 attacksTargetThe Pentagon (AA 77)1.00infobox
September 11 attacksTargetU.S. Capitol Building or the White House (UA 93; unsuccessful due to passenger revolt)1.00infobox

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.