9/11 Timeline: Three Hours That Changed Everything
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9/11 Timeline: Three Hours That Changed Everything

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9/11 Timeline: Three Hours That Changed Everything

For Americans and people watching around the world, September 11, 2001, is a day that will never be forgotten.

Within three hours, New York’s tallest buildings were reduced to rubble, and the Pentagon—the nerve center of the American armed forces—was burning and partially collapsed. Thousands of civilians had lost their lives and were seriously injured, and the entire country was in collective shock, still trying to make sense of how a coordinated act of terrorism of that magnitude was allowed to take place on American soil.

In the 20 years since 9/11, the events that occurred that morning have been analyzed in-depth from a thousand different angles. Even though the attacks took place in the era just before mobile phones had viable cameras, there are countless images and videos of the event. As well, we now have the 9/11 Commission Report, which compiles interviews from over 1,200 people in 10 countries, and draws upon two and a half million pages of documents to present its findings.

For many people younger than Generation X, 9/11 is a feeling—a grim milestone from their youth—but the details are likely more fuzzy. The timeline visualization above is a high-level record of what happened that morning during the three hours when everything changed.

A Chronology of Terror

In its most simple form, the 9/11 attacks can be described as a coordinated hijacking of four commercial airplanes, which were then used to fly into high profile targets in New York City and Washington, DC. Here is a summary of the planes involved in the incident:

911 hijacked planes

These four flights play a central role in what unfolded that morning. In the early hours of September 11, 2001, a collection of 19 would-be hijackers made their way through security at airports in Boston, Newark, and Washington, DC.

Our three-hour timeline begins just before 8am, as the first plane involved in the attack leaves the tarmac just outside of Boston. (In situations where the exact time isn’t known, a range is given.)


Sept 11, 2001, 7:59am – American Airlines Flight 11, a Boeing 767 carrying 81 passengers and 11 crew members, departs from Logan International Airport in Boston, bound for Los Angeles International Airport.

8:14 – United Airlines Flight 175, a Boeing 767, carrying 56 passengers and 9 crew members, departs from Logan International Airport in Boston, bound for Los Angeles International Airport.

8:14 – Flight 11 is hijacked over central Massachusetts. There are five hijackers on board.

8:20 – American Airlines Flight 77, a Boeing 757 with 58 passengers and 6 crew members, departs from Washington Dulles International Airport, for Los Angeles International Airport.

8:42 – United Airlines Flight 93, a Boeing 757 with 37 passengers and 7 crew members, departs from Newark International Airport, bound for San Francisco International Airport.

8:42–8:46 – Flight 175 is hijacked above northwest New Jersey. There are five hijackers on board.

8:46 – Flight 11 crashes into the north face of the North Tower (1 WTC) of the World Trade Center, between floors 93 and 99. All 92 people on board are killed.

8:50–8:54 – Flight 77 is hijacked above southern Ohio. There are five hijackers on board.

9:03 – Flight 175 crashes into the south face of the South Tower (2 WTC) of the World Trade Center, between floors 77 and 85. All 65 people on board are killed.

9:28 – Flight 93 is hijacked above northern Ohio. There are four hijackers on board.

9:37 – Flight 77 crashes into the western side of The Pentagon. All 64 people on board are killed.

9:45 – United States airspace is shut down; all operating aircraft are ordered to land at the nearest airport.

9:59 – The South Tower of the World Trade Center collapses, 56 minutes after the impact of Flight 175.

10:03 – Flight 93 is crashed by its hijackers in a field in Somerset County, Pennsylvania. Later reports indicate that passengers had learned about the World Trade Center and Pentagon crashes and were resisting the hijackers. All 44 people on board are killed in the crash.

10:28 – The North Tower of the World Trade Center collapses, 1 hour and 42 minutes after the impact of Flight 11. The Marriott Hotel at the base of the two towers is also destroyed.

10:50 – Five stories of the western side of the Pentagon collapse due to the fire.


Two and a half hours after the first plane left Boston, the iconic “Twin Towers” lay in ruins in Lower Manhattan, and brave first responders and military personnel were scrambling to save lives and secure the country.

Life in America was set on a new trajectory.

Information Shockwave

Two decades is a long time in the world of technology and media. Though the communication channels of that era may seem slow by today’s standards, the September 11 terrorist attacks still took place in the age of 24-hour cable news coverage and nascent online reporting.

Add in the fact that New York was (and still is) a linchpin of global media, and it’s easy to see why media coverage of the attack spread so quickly.

911 media information spread timeline

Within two minutes of the first impact on the World Trade Center, a nearby camera crew covering New York’s mayoral primary election was already broadcasting a live feed of the burning building to a TV audience. Within three minutes, news of the attack hit the Associated Press newswire, and moments after that, most major networks cut away from scheduled programming to cover the story.

Less than 10 minutes after the impact, President Bush–who was attending an event at a Florida elementary school–was informed of the crash (which at that point was characterized as an accident).

Because media outlets were able to cover the incident so quickly, millions of people witnessed the second plane striking the South Tower in real-time a mere 17 minutes after the first impact. This was a defining moment as millions of people around the world experience the events precisely as they unfolded.

The still-young internet was strained that day. Moments after the impact of the North Tower, the CNN and MSNBC websites experienced a crushing load of traffic that overwhelmed servers. The FBI’s website also experienced issues after posting the images of the 9/11 hijackers later that day.

Lasting Impact

The Pentagon has been repaired, and a shiny, 94-story World Trade Center now punctuates the skyline of Lower Manhattan, but not all wounds have healed.

For one, many 9/11 survivors are living with lingering health issues believed to be linked to the toxic smoke from the attack and building collapse. Many others are living with the absence of the nearly 3,000 loved-ones who died during the attacks.

The Department of Homeland Security (DHS) is still a lasting legacy of the 9/11 attacks. When DHS began operations in 2003, it was the largest U.S. government reorganization in the 50 years since the Department of Defense was created. In addition to this largely “hidden” layer of security, people now encounter more vigorous security protocol at airports around the world.

As well, the recent withdrawal from Afghanistan was a reminder that long shadow of the attack is still influencing events today, even two decades later.

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Technology

Every Mission to Mars in One Visualization

This graphic shows a timeline of every mission to Mars since 1960, highlighting which ones have been successful and which ones haven’t.

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Timeline: A Historical Look at Every Mission to Mars

Within our Solar System, Mars is one of the most similar planets to Earth—both have rocky landscapes, solid outer crusts, and cores made of molten rock.

Because of its similarities to Earth and proximity, humanity has been fascinated by Mars for centuries. In fact, it’s one of the most explored objects in our Solar System.

But just how many missions to Mars have we embarked on, and which of these journeys have been successful? This graphic by Jonathan Letourneau shows a timeline of every mission to Mars since 1960 using NASA’s historical data.

A Timeline of Mars Explorations

According to a historical log from NASA, there have been 48 missions to Mars over the last 60 years. Here’s a breakdown of each mission, and whether or not they were successful:

#LaunchNameCountryResult
11960Korabl 4USSR (flyby)Failure
21960Korabl 5USSR (flyby)Failure
31962Korabl 11USSR (flyby)Failure
41962Mars 1USSR (flyby)Failure
51962Korabl 13USSR (flyby)Failure
61964Mariner 3US (flyby)Failure
71964Mariner 4US (flyby)Success
81964Zond 2USSR (flyby)Failure
91969Mars 1969AUSSRFailure
101969Mars 1969BUSSRFailure
111969Mariner 6US (flyby)Success
121969Mariner 7US (flyby)Success
131971Mariner 8USFailure
141971Kosmos 419USSRFailure
151971Mars 2 Orbiter/LanderUSSRFailure
161971Mars 3 Orbiter/LanderUSSRSuccess/Failure
171971Mariner 9USSuccess
181973Mars 4USSRFailure
191973Mars 5USSRSuccess
201973Mars 6 Orbiter/LanderUSSRSuccess/Failure
211973Mars 7 LanderUSSRFailure
221975Viking 1 Orbiter/LanderUSSuccess
231975Viking 2 Orbiter/LanderUSSuccess
241988Phobos 1 OrbiterUSSRFailure
251988Phobos 2 Orbiter/LanderUSSRFailure
261992Mars ObserverUSFailure
271996Mars Global SurveyorUSSuccess
281996Mars 96RussiaFailure
291996Mars PathfinderUSSuccess
301998NozomiJapanFailure
311998Mars Climate OrbiterUSFailure
321999Mars Polar LanderUSFailure
331999Deep Space 2 Probes (2)USFailure
342001Mars OdysseyUSSuccess
352003Mars Express Orbiter/Beagle 2 LanderESASuccess/Failure
362003Mars Exploration Rover - SpiritUSSuccess
372003Mars Exploration Rover - OpportunityUSSuccess
382005Mars Reconnaissance OrbiterUSSuccess
392007Phoenix Mars LanderUSSuccess
402011Mars Science LaboratoryUSSuccess
412011Phobos-Grunt/Yinghuo-1Russia/ChinaFailure
422013Mars Atmosphere and Volatile EvolutionUSSuccess
432013Mars Orbiter Mission (MOM)IndiaSuccess
442016ExoMars Orbiter/Schiaparelli EDL Demo LanderESA/RussiaSuccess/Failure
452018Mars InSight LanderUSSuccess
462020Hope OrbiterUAESuccess
472020Tianwen-1 Orbiter/Zhurong RoverChinaSuccess
482020Mars 2020 Perseverance RoverUSSuccess

The first mission to Mars was attempted by the Soviets in 1960, with the launch of Korabl 4, also known as Mars 1960A.

As the table above shows, the voyage was unsuccessful. The spacecraft made it 120 km into the air, but its third-stage pumps didn’t generate enough momentum for it to stay in Earth’s orbit.

For the next few years, several more unsuccessful Mars missions were attempted by the USSR and then NASA. Then, in 1964, history was made when NASA launched the Mariner 4 and completed the first-ever successful trip to Mars.

The Mariner 4 didn’t actually land on the planet, but the spacecraft flew by Mars and was able to capture photos, which gave us an up-close glimpse at the planet’s rocky surface.

Then on July 20, 1976, NASA made history again when its spacecraft called Viking 1 touched down on Mars’ surface, making it the first space agency to complete a successful Mars landing. Viking 1 captured panoramic images of the planet’s terrain, and also enabled scientists to monitor the planet’s weather.

Vacation to Mars, Anyone?

To date, all Mars landings have been done without crews, but NASA is planning to send humans to Mars by the late 2030s.

And it’s not just government agencies that are planning missions to Mars—a number of private companies are getting involved, too. Elon Musk’s aerospace company SpaceX has a long-term plan to build an entire city on Mars.

Two other aerospace startups, Impulse and Relativity, also announced an unmanned joint mission to Mars in July 2022, with hopes it could be ready as soon as 2024.

As more players are added to the mix, the pressure is on to be the first company or agency to truly make it to Mars. If (or when) we reach that point, what’s next is anyone’s guess.

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Misc

Brand Loyalty is Declining for Most Luxury Automakers

Brand loyalty has declined for most luxury automakers, but three brands—Tesla, Maserati, and Genesis—appear to have bucked the trend.

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Brand Loyalty is Declining for Most Luxury Automakers

New research conducted by S&P Global Mobility has found that brand loyalty—measured as the percentage of buyers that go back to the same brand for their next vehicle—is falling across the luxury segment.

In this infographic, we’ve visualized the results of this research, which spans from January 2020 to April 2022.

Brand Loyalty Losers

The following brands have all experienced a drop in brand loyalty over the time period.

For additional context, we’ve also included each brand’s score in the J.D. Power 2022 Initial Quality Study. This is measured based on the number of problems experienced per 100 vehicles (PP100) in the first 90 days of ownership.

BrandPercentage Point Change
in Brand Loyalty
PP100
🇬🇧 Land Rover-9.2193
🇩🇪 Porsche-8.5200
🇺🇸 Lincoln-7.9167
🇩🇪 Audi-7.3239
🇩🇪 Mercedes-Benz-7.0189
🇮🇹 Alfa Romeo-6.6211
🇺🇸 Cadillac-6.4163
🇸🇪 Volvo-5.3256
🇯🇵 Infiniti-5.2204
🇬🇧 Jaguar-5.1210
🇯🇵 Lexus-4.8157
Luxury average-4.5199
🇯🇵 Acura-2.7192
🇩🇪 BMW-2.3165

Land Rover experienced the biggest drop in loyalty, despite a better than average PP100 rating. One potential reason is timing⁠—the brand’s premier model, the Range Rover, has been in its fourth generation since 2012. The SUV has become relatively dated, though a new fifth generation was recently revealed for the 2022 model year.

Two Volkswagen Group brands, Audi and Porsche, also fared poorly in terms of loyalty. This is somewhat surprising, as both brands offer a portfolio of both gasoline and electric models. Many competitors, such as Acura, Lexus, and Maserati, have yet to release an EV.

Brand Loyalty Winners

Three brands have managed to buck the trend, as shown below.

BrandPercentage Point Change
in Brand Loyalty
PP100
Luxury average-4.5199
🇺🇸 Tesla+4.0226
🇮🇹 Maserati+4.3255
🇰🇷 Genesis+8.5156

We can draw parallels between Tesla and Apple, in that both have incredibly loyal followers.

For instance, between March 2021 to April 2022, 62% of buyers/households who returned to market and previously owned a Model 3 purchased a new Tesla. That’s an impressive statistic, especially when we consider Tesla’s history of build quality issues.

Maserati appears to be in the same boat. The Italian automaker has strengthened its brand loyalty by 4.3 percentage points, despite having the luxury segment’s worst PP100. Perhaps build quality matters less than we think.

Another Factor to Consider

Ongoing supply chain issues could also be contributing to wide-spread declines in loyalty. Rather than waiting several months (or in the case of EVs, years), buyers may switch to a different brand that has cars in stock.

We are still monitoring it week to week, but up to now basically worldwide, we had no issues running production.
– Joerg Burzer, Mercedes-Benz

Many automakers have reported that their supply issues are diminishing, though new economic challenges have risen. For example, surging inflation has pushed the price of a new car to record highs. Combined with rising interest rates (cost of borrowing), this could negatively impact the demand for new cars.

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