@Advocate,
Actually, there have been many benefits from the manned space program.
Some of them include, but arent limited to, teflon, microcircuits, improved turnout gear for firefighters (fire suits),improved air scrubbing systems for the military and hospitals, and other things.
The US remains the world's only superpower. Let's choose not to measure that solely in tanks, planes and nukes. A great superpower should be based on the triad of power, compassion, and a commitment to explore the unknown. For a lousy 0.2% of the budget we can let our imaginations run wild, dream big dreams, and make some of them come true.