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By February 1945, the United States had been fighting World War II for more than three years. Soldiers were worn down from battle, and civilians were drained by sacrifice. But a photograph of Marines raising an American flag on Japanese soil gave a wearied nation a renewed sense of pride and hope.

What does it take to be a soldier? Strength and intelligence both play a part, but soldiers need extra help to do their job of defending their country. Enter technology such as satellites, robotics, and computers. Learn all about these forms of technology and the scientific principles behind them.

In the 1930s, photographer Dorothea Lange traveled the American West documenting the experiences of those devastated by the Great Depression. She wanted to use the power of the image to effect political change, but even she could hardly have expected the effect that a simple portrait of a worn-looking woman and her children would have on history.

It is a bizarrely beautiful image: A man in a spacesuit stands isolated in an alien world. His companion, the photographer, and their landing craft are reflected in his visor. This photograph, taken by Neil Armstrong of fellow astronaut Buzz Aldrin, is the most famous documentation of America’s 1969 moon landing. But to people in every country on Earth, it represented and still does so much more.

Humans have used weapons to fight their enemies since the dawn of history. Today’s military arsenal is filled with the most accurate and sophisticated tools yet. Learn all about these high tech weapons and the science that went into their development.

In May 1963, news photographer Charles Moore was on hand to document the Children’s Crusade, a civil rights protest. But the photographs he took that day did more than document an event; they helped change history.