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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Misc

Visualizing Two Decades of Reported Hate Crimes in the U.S.

Hate crimes across the U.S. have been on the rise since 2014. Here’s a look at the most common types of offenses over the years.

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Two Decades of Hate Crimes in the U.S.

Visualizing Two Decades of Reported Hate Crimes in the U.S.

Across the U.S., thousands of hate crimes are committed each year, with many different motivating biases.

In 2020 alone, more than 10,000 unique hate crime incidents were reported to the Federal Bureau of Investigation (FBI)—and it’s likely that thousands more were committed that didn’t get reported to law enforcement.

What are the most commonly reported motivating biases, and how have hate crime rates evolved over the years? This graphic uses data from the FBI to visualize two decades of reported hate crime incidents across America.

What is Considered a Hate Crime?

Before diving in, it’s important to determine what constitutes a hate crime.

According to the U.S. Department of Justice, a hate crime is a crime that’s “committed on the basis of the victim’s perceived or actual race, color, religion, national origin, sexual orientation, gender, gender identity, or disability.”

These types of crimes are a threat to society, as they have a broader impact on communities than other types of crimes do. This is because hate crimes can foster fear and intimidate large groups of people or marginalized communities, making them feel unwelcome, unsafe, or othered.

Hate Crimes on the Rise

Hate crimes have been rising across the U.S. in nearly every year since 2014. By 2020, reported crimes across America reached record-level highs not seen in over two decades.

YearNumber of Reported Incidents% Change (y-o-y)
2001973018.4%
20027485-23.1%
200375450.8%
200476851.9%
20057411-3.6%
200677154.1%
20077625-1.2%
200880395.4%
20096613-17.7%
201066330.3%
20116299-5.0%
201265944.7%
20136044-8.3%
20145599-7.4%
201558714.9%
201662766.9%
2017732116.7%
20187170-2.1%
2019789210.1%
20201029930.5%

And sadly, these figures are likely a vast undercount. Law enforcement submit this data to the FBI of their own volition, and in 2020, thousands of agencies did not submit their crime statistics.

Race-Related Hate Crimes are Most Common

Historically, the most reported hate crimes in the U.S. are related to race. In 2020, about 66% of incidents were motivated by discrimination against the victim’s race or ethnicity.

Type of BiasTotal Number of Crimes (2020)% of Total
Race/Ethnicity679366.0%
Religion162615.8%
Sexual Orientation131112.7%
Other5695.5%
Total10299--

While race is the most commonly reported hate crime, incidents related to gender and gender identity are on the rise—in 2020, there was a 9% increase in gender-related incidents, and a 34% increase in gender identity-related incidents, compared to 2019 figures.

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Science

Visualizing the Relationship Between Cancer and Lifespan

New research links mutation rates and lifespan. We visualize the data supporting this new framework for understanding cancer.

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Cancer and lifespan

A Newfound Link Between Cancer and Aging?

A new study in 2022 reveals a thought-provoking relationship between how long animals live and how quickly their genetic codes mutate.

Cancer is a product of time and mutations, and so researchers investigated its onset and impact within 16 unique mammals. A new perspective on DNA mutation broadens our understanding of aging and cancer development—and how we might be able to control it.

Mutations, Aging, and Cancer: A Primer

Cancer is the uncontrolled growth of cells. It is not a pathogen that infects the body, but a normal body process gone wrong.

Cells divide and multiply in our bodies all the time. Sometimes, during DNA replication, tiny mistakes (called mutations) appear randomly within the genetic code. Our bodies have mechanisms to correct these errors, and for much of our youth we remain strong and healthy as a result of these corrective measures.

However, these protections weaken as we age. Developing cancer becomes more likely as mutations slip past our defenses and continue to multiply. The longer we live, the more mutations we carry, and the likelihood of them manifesting into cancer increases.

A Biological Conundrum

Since mutations can occur randomly, biologists expect larger lifeforms (those with more cells) to have greater chances of developing cancer than smaller lifeforms.

Strangely, no association exists.

It is one of biology’s biggest mysteries as to why massive creatures like whales or elephants rarely seem to experience cancer. This is called Peto’s Paradox. Even stranger: some smaller creatures, like the naked mole rat, are completely resistant to cancer.

This phenomenon motivates researchers to look into the genetics of naked mole rats and whales. And while we’ve discovered that special genetic bonuses (like extra tumor-suppressing genes) benefit these creatures, a pattern for cancer rates across all other species is still poorly understood.

Cancer May Be Closely Associated with Lifespan

Researchers at the Wellcome Sanger Institute report the first study to look at how mutation rates compare with animal lifespans.

Mutation rates are simply the speed at which species beget mutations. Mammals with shorter lifespans have average mutation rates that are very fast. A mouse undergoes nearly 800 mutations in each of its four short years on Earth. Mammals with longer lifespans have average mutation rates that are much slower. In humans (average lifespan of roughly 84 years), it comes to fewer than 50 mutations per year.

The study also compares the number of mutations at time of death with other traits, like body mass and lifespan. For example, a giraffe has roughly 40,000 times more cells than a mouse. Or a human lives 90 times longer than a mouse. What surprised researchers was that the number of mutations at time of death differed only by a factor of three.

Such small differentiation suggests there may be a total number of mutations a species can collect before it dies. Since the mammals reached this number at different speeds, finding ways to control the rate of mutations may help stall cancer development, set back aging, and prolong life.

The Future of Cancer Research

The findings in this study ignite new questions for understanding cancer.

Confirming that mutation rate and lifespan are strongly correlated needs comparison to lifeforms beyond mammals, like fishes, birds, and even plants.

It will also be necessary to understand what factors control mutation rates. The answer to this likely lies within the complexities of DNA. Geneticists and oncologists are continuing to investigate genetic curiosities like tumor-suppressing genes and how they might impact mutation rates.

Aging is likely to be a confluence of many issues, like epigenetic changes or telomere shortening, but if mutations are involved then there may be hopes of slowing genetic damage—or even reversing it.

While just a first step, linking mutation rates to lifespan is a reframing of our understanding of cancer development, and it may open doors to new strategies and therapies for treating cancer or taming the number of health-related concerns that come with aging.

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