Overview
The design and manufacturing of large jet engines; non-lethal weapons that stun without killing; the world's largest telescope.
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4 - 1Forest Fires, Car Exhaust, Space Station April 11, 2007 -
4 - 2Family Car, Titanium, Letter April 11, 2007
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4 - 3Nuclear Sub, Crash Test Dummies, Fruit and Vegetables April 18, 2007
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4 - 4Land Mines, Air Boats, Warehouses April 18, 2007
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4 - 5Black Boxes, Steam Turbine, Racing Car April 25, 2007
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4 - 6Jet Engine, Weapons, Telescope April 25, 2007