The latter include, for example: supercomputers, advanced machine tools, fiber optic and other sophisticated telecommunications gear, jet engine hot sections, rocket propulsion and guidance components, "stealth" technology, to name a few.

CENTERFORSECURITYPOLICY: Clinton Lets Trade Trump Security, Again

On a hot June evening at a ramshackle former gliderport 30 miles east of Dallas, John Carmack's rocket engine lit up with its blue flame spewing from the nozzle.

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