About 2.5 million American students watched the Challenger disaster live

Watch the Challenger disaster unfold in real time

On January 28, 1986, Space Shuttle Challenger broke apart just 73 seconds after liftoff. This live CNN broadcast captures the tragedy as it happened—second by second—showing the shock and confusion of one of NASA's darkest moments.

The Challenger disaster ended NASA's plan to fly ordinary Americans in space

The explosion of the Challenger halted NASA's civilian spaceflight ambitions for decades, including plans to send teachers, journalists, artists, and other nonastronauts into orbit—an effort aimed at building public support that quietly disappeared after the 1986 disaster.

The Teacher in Space program was launched in 1984 to highlight spaceflight in US classrooms

Announced by President Ronald Reagan, the program drew more than 11,000 teacher applicants nationwide. Christa McAuliffe was selected to fly on STS-51L, with plans to teach live lessons from orbit before the Challenger disaster ended the mission.

Watch the lessons Christa McAuliffe was supposed to teach aboard Challenger

After the Challenger disaster prevented McAuliffe from teaching in orbit, educators-turned-astronauts Joe Acaba and Ricky Arnold filmed her planned science demonstrations aboard the International Space Station during the 2017-18 school year.

The Challenger disaster exposed flawed priorities in NASA's leadership

Reported issues with the shuttle's O-rings were deemed "acceptable risks" to proceed with the launch and ensure President Reagan could mention the success of Challenger in his State of the Union address. Postponing the launch would have also limited the publicity of educator Christa McAuliffe's live lesson from space.

Listen to the five-part podcast series that reconstructs how Challenger failed

The "American Scandal" podcast devotes a five-part series to Challenger, tracing the engineering warnings, internal pressure to launch, the moment of the explosion, and the long aftermath that reshaped NASA's safety culture.

The Challenger disaster delayed the launch of the Hubble Space Telescope

The 1986 explosion of the space shuttle shortly after liftoff killed seven crew members and grounded NASA's space fleet. Scientists used the downtime to refine ground control software and upgrade telescope instrument sensitivity, but maintaining the telescope's clean room storage cost NASA approximately $6M per month.

Explore what Challenger was supposed to do on its mission

STS-51L's planned seven-day mission included deploying satellites, studying Comet Halley, conducting fluid dynamics experiments, and broadcasting live lessons from orbit—routine scientific and educational tasks that were never carried out after the shuttle was lost shortly after launch.

President Reagan postponed the State of the Union after Challenger

In his Oval Office address delivered the night of the disaster, President Ronald Reagan spoke directly to the nation about the loss of Challenger and its crew, postponing that evening's scheduled State of the Union to address the tragedy.

Evidence suggests some of the Challenger's crew may have been alive after the explosion

Recovery of the intact crew cabin and later analysis of flight data led investigators to conclude the astronauts likely survived the initial breakup and remained alive during the roughly two-minute descent before the cabin struck the ocean.

Watch an American news report of the Chernobyl disaster

Americans first heard about the Chernobyl nuclear disaster two days after the event, once abnormal radiation was detected in nearby countries. This forced Soviet officials to acknowledge the catastrophe publicly for the first time a few days after it occurred.

Watch one of the greatest live TV shots ever

While James Burke was filming the 1978 docuseries "Connections" at the site of a rocket launch, he pulled off a perfectly-timed gesture without use of a green screen. Some say its the greatest live shot ever in TV history.

Watch a 1957 news report on the Sputnik launch

This 1957 news report captures the shock and uncertainty that followed the launch of Sputnik, showing how the first artificial satellite immediately altered global politics, military planning, and public perceptions of technological power.

Watch a montage of space-based Earth views as astronauts discuss their overview experiences

As of 2023, more than 600 astronauts and 63 space tourists have seen Earth from space, experiencing a life-changing perspective shift as they view the entirety of our home planet.

Cold War nuclear tests exposed thousands to atomic blasts

After World War II, nuclear powers conducted thousands of weapons tests. This video pairs archival footage with interviews of veterans who witnessed Pacific test explosions, capturing the scale, shock, and human experience of being near a nuclear detonation.

Take a multimedia journey through the thirteen days that nearly ended the world

In October 1962, the Cuban Missile Crisis brought the US and Soviet Union to the brink of nuclear war. This interactive archive from the JFK Library reconstructs those tense days through documents, photos, and secretly recorded conversations from the Kennedy White House.

Jacqueline Kennedy's 1962 White House tour drew 80 million viewers worldwide

Broadcast simultaneously on CBS and NBC, and a few days later on ABC, the first lady's televised tour introduced the restored White House to an audience of between 50 million and 80 million. The program elevated public appreciation of American history and the significance of the White House.

How the NSF Public Understanding of Science program fueled science interest and literacy

To support STEM education at all levels and in all settings, the NSF has invested in public-facing science projects since 1957. These investments produced science education storytelling and entertainment programming, including "Bill Nye the Science Guy," "The Magic School Bus," and the "Flight of the Butterflies" and "Blue Whales" IMAX films.

The Kent State massacre sparked a nationwide student strike

In 1970, the Ohio National Guard opened fire on Kent State University students—peacefully protesting the Vietnam War—and killed four. The tragedy led to more widespread nationwide protests, shutting down more than 200 colleges and universities. The event led to a Pulitzer Prize-winning photo of a slain and grieving student.

The 'Miracle on the Hudson' showed heroism in the air and changed social media forever

On Jan. 15, 2009, US Airways Flight 1549 lost both engines after hitting birds and was safely landed in the Hudson River. The event was a turning point for Twitter, as a photo and a tweet quickly spread—marking Twitter's rise as a real-time news source.

How the Discovery Channel was originally built for lifetime learners

Founder John Hendricks envisioned Discovery as a launchpad for educational content that was both informative and engaging. Since, the channel has spawned dozens of other channels, merged with major studios, and launched its own streaming platforms.

How student loans became incredibly prevalent

As of 2024, the total outstanding federal student loan debt sat at $1.6T, held by almost 43 million borrowers. Explore the history of student loans and how they became prevalent in the US, as told by several influential actors in the creation of the program over the years.

Today’s kids would rather be YouTubers than astronauts

While the other children in your kindergarten class might have wanted to be firefighters or astronauts when they grew up, modern kids are different. Lego conducted a study that found children were more likely to say they wanted to be a YouTuber when they grew up than an astronaut.

The children of parents who died on 9/11 share their stories in remembrance

Many children of 9/11 victims were too young to remember their parents who died. They’ve grown up living with the tension between having a personal connection to the day but few, if any memories. Read some of their stories.

The day the dinosaurs died

Roughly 66 million years ago, a giant meteor struck Earth off the coast of the Yucatán Peninsula. Some dinosaurs died in the immediate impact, which sent a 200-foot tsunami all the way up to what is now North Dakota. Many others perished in the resulting change in climate, with debris ejected into the global atmosphere. This 12-minute video provides an overview of what scientists have uncovered about the fateful day.

Roughly 43 million US borrowers owe roughly $1.7T in student debt, the second-largest source of consumer debt behind mortgages.

Children are now three times more likely to say they want to be a YouTuber when they grow up than an astronaut, with some even attending 'YouTube camps' that teach kids how to create content for the platform.

Before humans, the Soviet Union and the United States sent animals—including apes, dogs, and cats—to space during the Space Race.

In 1984, Operation Smash Hit intentionally crashed a 239-ton train into a nuclear waste canister at 100 miles per hour to prove the canister's safety, which remained completely intact and lost just 0.29 of its 100 pounds of pressure.

In 2009, the nation was gripped by the story of a missing young boy who was believed to be floating over Colorado in a homemade balloon, until it was revealed that he was at home the whole time.

After NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

Explore the known asteroids, comets, and spacecraft involved in asteroid studies within our solar system with 'Eyes on Asteroids,' a 3D visualization from NASA.

View the ten deadliest tornadoes in US history.

The tragic Pulitzer Prize-winning image 'The Vulture and the Little Girl' (1993) generated controversy, raised concerns about ethics in photography, and eventually led to the photographer's death.

A Yale student wrote a profound essay about the consulting industry's influence on elite college students that was published in a book of her writing after she died in a post-graduation car accident.

Exploring the Larry Bird punch that almost changed March Madness

Neutron stars, the remains of some massive stars after they explode in a supernova, are the densest directly observable objects in the universe.

Watch contemporary footage covering the US-backed Shah of Iran fleeing the country in the face of the 1979 Iranian Revolution

About 12.5% of US adults experience a phobia in their lifetime, a diagnosis that hinges on the intense fear interfering with daily life and persisting for at least six months.

Fireworks-related ER visits are on the rise—in 2024, they increased by 52% as compared to the prior year.

Before writing 'Walden,' transcendentalist Henry David Thoreau nearly burned down his hometown with a campfire that grew out of control.

After 25 people used virtual reality headsets to practice flying with virtual wings—flapping their arms—their visual cortex responded to the wings almost as if they were real arms, treating them as body parts.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

Brandi Chastain, the star of the 1999 US victory over China in the 1999 Women's World Cup, was a last-second choice to take the penalty kick that sealed the victory.

Elk Cloner, the first computer virus to spread in public, was written as a practical joke by Richard Skrenta, a Pittsburgh high school student.

When a Paris department store hesitated to sell Estée Lauder's perfume, she 'accidentally' broke a bottle, causing the smell to spread throughout the store and shoppers to start asking to buy the scent.

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

This real-time tracking of the hantavirus cruise ship outbreak in May 2026 offers a unique glimpse into the global reach of the outbreak and whether the virus sickened passengers and their communities around the world.