Category: Educational
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Flightgear Training
Introductory training in simulated flight for high school students Read more
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Educational Graphics
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Grenville Rocks
Just outside Baltimore, there’s a trail in a state park that winds down toward a small river. The river descends through a short rapids, gliding over rock. The rock is unique; it’s over a billion years old. It’s known as the Baltimore gneiss. This is what it looks like: The DC metro area has been Read more