April 28, 1991
Space Shuttle Discovery launches on STS-39, the first unclassified shuttle mission for the United States Department of Defense.
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Source: Wikipedia (CC BY-SA)
On April 28, in the year 1991:
Space Shuttle Discovery launches on STS-39, the first unclassified shuttle mission for the United States Department of Defense.
Space Shuttle Discovery is a retired American Space Shuttle orbiter.
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Source: Internal
Why April 28, 1991 matters:
Space Shuttle Discovery launches on STS-39, the first unclassified shuttle mission for the United States Department of Defense.
What began on this day left a lasting mark on history. The effects were felt immediately and continued to shape events, ideas, and lives long afterwards.
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Source: Internal
Historical context: April 28, 1991
The 20th century brought change at a pace unprecedented in history: two world wars, the rise and fall of fascism and communism, decolonisation, the Cold War, the space race, and revolutions in science, technology, and human rights all compressed into one hundred years.
The event on this day: Space Shuttle Discovery launches on STS-39, the first unclassified shuttle mission for the United States Department of Defense.
Source: https://en.wikipedia.org/wiki/Space_Shuttle_Discovery (Wikipedia, CC BY-SA)
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