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John Glenn pre-flight

Friendship 7 launch

Glenn smiles after mission

7 Mercury astronauts

Looking into a globe

Friendship 7 logo

Glenn and Friendship 7 artist

Mercury astronauts

Glenn on balance beam

Sunset by Glenn

Glenn during the mission

Disorientation training

Getting in the capsule

Survival training

Survival training in Panama

Glenn in T-106

Mercury astronauts and the Convair 106-B

Glenn in his Mercury spacesuit

Lifted into helicopter

With JFK

Parachute drop

Glenn photographs Earth from the Space Shuttle

Glenn's official Space Shuttle crew portrait

Glenn and Clinton

Glenn in training

Clinton and STS-95 crew

Glenn thumb's-up

After several years of intense competition to see who would dominate the heavens, the Soviet Union and the United States entered the 1960s nearly neck-and-neck. But when Soviet cosmonaut Yuri Gagarin became the first human into space on April 12, 1961, the American space program suffered a significant blow.

Yet NASA didn't throw in the towel. Less than a month later, astronaut Alan Shepard became the first American to launch into space, and then, on Feb. 20, 1962, John Glenn followed that great achievement by becoming the first American to orbit the Earth.

Now, 50 years later, NASA is celebrating Glenn's historic mission, and all Americans have yet another reason to look back at one of the most ambitious periods in our history, and at some of our biggest heroes.

Caption by / Photo by NASA
On Feb. 20, 1962, John Glenn was launched into orbit aboard Friendship 7. Glenn was one of seven astronauts in America's seminal Mercury program, and this photograph, of Glenn's launch, became one of the most memorable images in the history of our space explorations.
Caption by / Photo by NASA
In this Feb. 20, 1962 photograph, Glenn smiles after the completion of his three-orbit mission into space. Although the mission was a success, it was nearly a disaster. During his re-entry into the Earth's atmosphere, a warning light went on that indicated his capsule's heat shield was loose. Though it was a false alarm, no one knew it and technicians on the ground decided to take action. They felt it was important to keep Friendship 7's retro-rocket pack attached rather than letting it go upon re-entry. The result was what Glenn saw as a "rear fireball," the pack burning away as he shot through the atmosphere.
Caption by / Photo by NASA
A Mercury program promotional graphic depicting all seven of America's first astronauts. From left to right, Scott Carpenter, Gordo Cooper, John Glenn, Gus Grissom, Wally Schirra, Alan Shepard, and Deke Slayton.
Caption by / Photo by NASA
In this image, taken on August 17, 1961, Glenn peers into a Celestial Training Device--otherwise known as a globe--during astronaut training at Cape Canaveral's Aeromedical Lab.
Caption by / Photo by NASA
The logo for Glenn's Friendship 7.
Caption by / Photo by NASA
Glenn sits alongside Friendship 7 with Cecilia Bibby, the artist who painted the famous logo on the Mercury spacecraft.
Caption by / Photo by NASA
All seven of the Mercury astronauts pose for a photograph on Dec. 3, 1962. In the front row, from left to right are Wally Schirra, Deke Slayton, John Glenn, and Scott Carpenter. In the back row, from left to right, are Alan Shepard, Gus Grisson, and Gordo Cooper.
Caption by / Photo by NASA
Well after his famous flight, Glenn tested his balance by walking barefoot along a narrow board with eyes closed. The photograph was taken on Feb. 2, 1964, nearly two years after Glenn's Friendship 7 flight.
Caption by / Photo by NASA
During his three-orbit trip around Earth, Glenn took many photographs, including this one of orbital sunset.
Caption by / Photo by NASA
Glenn traveled around the Earth three times during his mission. Here, we see him in flight aboard Friendship 7 on Feb. 20, 1962.
Caption by / Photo by NASA
On August 17, 1961, Glenn underwent disorientation testing at the U.S. Navy's School of Aviation Medicine, including this exam where he is seated in a rotating chair.
Caption by / Photo by NASA
Glenn slips into the Friendship 7 capsule just prior to launch time for his historic mission.
Caption by / Photo by NASA
NASA put the Mercury astronauts through a wide variety of tests, including survival training in several different environments. This included desert survival, which NASA put the astronauts through at Stead Air Force Base in Nevada. From left to right, the astronauts--seen in Arab-looking garb--are Gordo Cooper, Scott Carpenter, John Glenn, Alan B. Shepard, Gus Grissom, Wally Schirra, and Deke Slayton. Portions of their outfits were made from parachute material.
Caption by / Photo by NASA
On June 6, 1963, 16 NASA astronauts took part in survival training at the Albrook Air Force Base in Panama's Canal Zone. From left to right is a trainer, Neil Armstrong, John Glenn, Gordo Cooper, and Pete Conrad.
Caption by / Photo by NASA
Glenn poses for a picture in the cockpit of a T-106 on Jan. 10, 1961.
Caption by / Photo by NASA
On Jan. 20, 1961, all seven Mercury astronauts stood alongside a Convair 106-B. From left to right, we see Carpenter, Cooper, Glenn, Grisson, Schirra, Shepard, and Slayton.
Caption by / Photo by NASA
Glenn is seen here in his Mercury spacesuit.
Caption by / Photo by NASA
After the successful completion of his orbital mission aboard Friendship 7 Glenn is hoisted into a recovery helicopter from the USS Noa on the way to being transferred to the USS Randolph. Friendship 7 landed about near Grand Turk Island, 41 miles west and 19 miles north of his intended landing target, according to NASA.
Caption by / Photo by NASA
Glenn shakes hands with President John F. Kennedy, who presented the astronaut with NASA's Distinguished Service Award. Standing behind Glenn is his wife Annie.
Caption by / Photo by NASA
In 1998--more than three decades after his Mercury flight--Glenn returned to space as part of the Space Shuttle Discovery STS-95 crew. Here, Glenn is participating in a simulated parachute drop during training for the mission.
Caption by / Photo by NASA
During his time aboard the Space Shuttle Discovery, Glenn shoots photographs of the Earth.
Caption by / Photo by NASA
This is John Glenn's official Space Shuttle STS-95 crew portrait. Glenn and the rest of his crew launched aboard Discovery in 1998, making him America's oldest astronaut.
Caption by / Photo by NASA
Glenn explains some of the elements of a mockup of Spacelab to then-President Bill Clinton.
Caption by / Photo by NASA
Here, Glenn participates in a training session prior to the launch of STS-95 in 1998.
Caption by / Photo by NASA
President Bill Clinton congratulates the crew of STS-95 during a speech. Glenn is just to the left of Clinton.
Caption by / Photo by NASA
Glenn gives the thumb's-up. In 1998, he became America's oldest astronaut when he flew aboard the Space Shuttle Discovery as part of the STS-95 crew.
Caption by / Photo by NASA
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