I don't have any objections to Orion in orbit, if it's a danger to the space comm infrastructure, I think we'd hear from those folks well in advance.

I think it's a great idea for accelerating interplanetary cyclers or the like.

I really don't think it would be a good idea within the atmosphere even if done in China. Let's say, oh they put a launch site in the Gobi desert far from any settlement. The radioactive fallout is going to be spread globally.

Do you really feel ok with the idea of fallout precipitating on your kids Tom?

You claim everything is OK after years of above ground nuclear testing in COTUS where you could even see the mushroom clouds from Las Vegas on it's path into the stratosphere and over the northern plains where we both grew up. Ever know anyone with thyroid cancer back home? Sure, it hasn't sterilized the Earth but do we really know the cases of cancer that were a direct result.

Dust from the Gobi leaving Asia....

Passing over the Eastern U.S.