In April 1966, Lyndon Johnson was president of the United States, protests of the Vietnam War were growing, gas was priced at 32 cents per gallon, "(You're My) Soul and Inspiration" was the No. 1 song on the Billboard charts, "Bonanza" was the No. 1 television show in the country and Ronald Reagan was successfully campaigning to become governor of California.
Beyond Earth, the Russian spacecraft Luna 9 was on the surface of the moon, having soft landed in early February to send back the first photos from the lunar surface. Luna 10 was orbiting the moon, the first man-made craft to do so, while the United States was recovering from the Gemini 8 mission, which reached space but had to be aborted within hours because of a thruster malfunction.
Meanwhile, a group of NASA engineers and operators were tucked away in a small concrete building on a misty spring morning in South Mississippi, working on last-minute issues in their attempt to test the first Saturn V rocket stage at what later would become Stennis Space Center.
The first test
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They were entering their 25th consecutive hour as daylight began to grow on the morning of April 23.
The countdown to the test had begun the previous morning, with high-level visitors and television cameras on the scene to view and record the event.
Issue after issue, not entirely unexpected, arose through that first day and into the night. Some visitors left; others grabbed snatches of sleep wherever they could. Teams of technicians worked through the hours to address problem areas.
Finally, in the dawning gray of the day, a loudspeaker voice was heard, counting down at last into single digits -- "5-4-3-2-1 . " The bright red-and-orange flame came first, followed an instant later by the crack of ignition carried across the heavy air. "We have fire in the bucket!" someone announced.
Fifteen seconds later, the flame and sound ended as planned. The first Saturn V rocket stage test was complete.
It's hard to overestimate the impact of the event. The Space Age had arrived in South Mississippi, and the United States was headlong on its way to the moon.
As soon as President John F. Kennedy challenged the United States to send humans to the moon by the end of the 1960s, there was no denying NASA would need a place to test the massive engines and rocket stages needed to meet that challenge.
And as soon as NASA announced plans to build such a test site in Hancock County, there was no denying the historical significance of the work that would be performed there.
"I don't know yet what method we will use to get to the moon, but I do know that we have to go through Mississippi to get there," said Wernher von Braun, director of NASA's Marshall Space Flight Center and architect of early U.S. space exploration efforts.
"Go through Mississippi" is just what happened. Forty-three tests and 1,154 days after that first hot-fire test, Neil Armstrong, who had served as command pilot on that shortened Gemini 8 mission, would take "one giant leap for mankind" onto the surface of the moon. The rocket stages that carried him and 11 others to the lunar surface were all tested at Stennis.
50 years later
This year, Stennis marks the 50th anniversary of that April day in 1966 and five decades of testing in support of America's space program. In all those years, through both the Apollo and Space Shuttle Programs, no mission ever failed as a result of a malfunction in a Stennis-tested engine.
"The record of excellence is continuing as we test engines for NASA's new Space Launch System Program, which will carry humans deeper into space than ever before and eventually to Mars," Stennis Director Rick Gilbrech said. "What started here in 1966 has grown tremendously. When you talk American space exploration, the road to deep space continues to run through Stennis."
Stennis has grown into the largest rocket engine test site in the nation. Private companies such as Orbital Sciences Corporation, SpaceX and Blue Origin are partnering with NASA to test engines and components at Stennis.
Many engineers and operators who enabled and witnessed the first test still live in the area. Others now working at Stennis are second- or third-generation family members who were brought up on the stories of the site's early days.
"There is a real sense of history at this place," Gilbrech said. "We honor the past, but more importantly, we are adding new chapters to the history of human space exploration."