Phlog,
"I don't think any craft currently in service that re-enters the Earth's atmosphere has running lights"
You are correct on landing/running lights because we light up the runways from what I can tell. Not to split hairs but they do have external lighting that is used.
http://optoelectronics.perkinelmer.com/catalog/Category.aspx?CategoryName=Space+Vehicle+Lighting
But I am pretty sure our lunar landers had docking lights. Because there wouldn't be a welcoming party.
If we were creating a craft to take people places beyond our solar system, say in 150 years from now, wishfull thinking, I think we would put some damn good lights on it IMO. Maybe we wouldn't turn em on and buzz their version of Stephenville, but we would have them.
Oli,
"Invisdible third hurdle?
Please elucidate."
Scientist recently have broken the three dimensional invisible hurdle. They created a fabric which could bend light around an object. If you wrapped yourself in this fabric and I looked at you, I would see the person standing behind you. IMO, humble opinion. This would be something that the military would have been working on for some time and would probably want to incorporate it into all sorts of equiptment.
40-50 years + of anti stealth, fair enough but I was trying to be conservative on when we as the public were informed about stealth planes, not in our military's attempt to get around radar systems in many other ways. I was specifically referring to known successes such as the first combat stealth planes, I believe were F117's in the 80's.