I'd like to see a laser that could punch through that much atmosphere and still have enough energy to damage military hardware in a useful manner.
Originally Posted by Antice
And then we get wiped out from an asteroid that we could have stopped with nukes or nuke-pulse propulsion. Thanks.
As far as making bombs with it. forget it. it's much easier/cheaper to use uranium 238 targets and breed some plutonium instead. much easier to make a bomb out of plutonium. (still so expensive that apart from the political scare factor they are indeed not really worth it).
The second objection against proliferation arguments, is the fact that these reactors are not being developed by non nuclear capable nations. the players capable of making the LFTR happen already got more nukes than they know what to do with. the LFTR's may even get their startup charges from decommissioned nuclear bombs. Now how's that for swords to plowshares?
Et tu BAUT? Quantum mutatus ab illo.